Supply Chain Modelling
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This article discusses the importance of supply chain modelling and its role in optimizing operations and reducing costs. It focuses on designing a cost-effective supply chain for Dronautics Ltd. and provides recommendations for minimizing operational costs. The article also explores the concept of distribution center policy and the rationality behind it.
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Running Head: SUPPLY CHAIN MODELLING
1
SUPPLY CHAIN MODELLING
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SUPPLY CHAIN MODELLING
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SUPPLY CHAIN MODELLING
2
Introduction
Modelling of the most efficient supply chain is a very vital part of developing and
validating the entire supply chain as well as the distribution network of an organization. By
definition supply chain is a web of individuals, resources, organisations, technology and
activities that are involved with the product creation and sales (Bottani, et al., 2015). This line
stretches from the delivery of raw materials to the organizations production sites to the supply of
the finished goods to the consumers (Bilgen, Bilge, & Yelda, 2013). Management of the supply
chain therefore involved an oversight of information, materials and the finances as they move
across the network from the supplier of raw materials to the consumer of the finished goods. The
three major flows under the supply chain is the information flow, product flow and finance flow.
The focus of the supply chain is therefore the coordination of this flows within and among
outside firms dealing with the organization (Acar, et al., 2010).
The trading that normally do take place within a supply chain is composed of several firm
each trying to optimize its profits with little knowledge or interest in the other players. To enable
fair competition and ethical considerations firms have come up with codes of conduct that assist
guide transactions within parties. These ethical boundaries have made corporations to make
demands from their suppliers to comply with social needs (Alzaman & Chaher, 2014). Lack of
transparency in the supply chain defined as mystification bars consumers from gaining
significant knowledge of product generation line and can allow socially irresponsible practices in
the supply chain (Charkha, Pranav, Jaju, & Santosh, 2014).
In this report the focus is to design a supply chain for Dronautics Ltd. This is a drone
manufacturing firm that undertakes its activities in three manufacturing sites across Australia. In
2
Introduction
Modelling of the most efficient supply chain is a very vital part of developing and
validating the entire supply chain as well as the distribution network of an organization. By
definition supply chain is a web of individuals, resources, organisations, technology and
activities that are involved with the product creation and sales (Bottani, et al., 2015). This line
stretches from the delivery of raw materials to the organizations production sites to the supply of
the finished goods to the consumers (Bilgen, Bilge, & Yelda, 2013). Management of the supply
chain therefore involved an oversight of information, materials and the finances as they move
across the network from the supplier of raw materials to the consumer of the finished goods. The
three major flows under the supply chain is the information flow, product flow and finance flow.
The focus of the supply chain is therefore the coordination of this flows within and among
outside firms dealing with the organization (Acar, et al., 2010).
The trading that normally do take place within a supply chain is composed of several firm
each trying to optimize its profits with little knowledge or interest in the other players. To enable
fair competition and ethical considerations firms have come up with codes of conduct that assist
guide transactions within parties. These ethical boundaries have made corporations to make
demands from their suppliers to comply with social needs (Alzaman & Chaher, 2014). Lack of
transparency in the supply chain defined as mystification bars consumers from gaining
significant knowledge of product generation line and can allow socially irresponsible practices in
the supply chain (Charkha, Pranav, Jaju, & Santosh, 2014).
In this report the focus is to design a supply chain for Dronautics Ltd. This is a drone
manufacturing firm that undertakes its activities in three manufacturing sites across Australia. In
SUPPLY CHAIN MODELLING
3
the recent period the firm has experienced a rampant growth in the demand for its products
(Clodia, Angeloantonio, & Francesco, 2009). Even though their production capacity was flexible
enough and have managed to meet the new demands, the problem the firm is facing is the
increased transport cost. Initially drones were transported as single units but due to the
emergence of a new cheaper method that is transporting the drones as pallets consisting of 240
units, the management of Dronautics is reconsidering the supply chain network. Will therefore
model the most cost-effective supply chain and make recommendations that can assist the
Dronautics management minimize its operational cost (Gabriela & Jorge, 2011).
1. Selection of the optimal production sites
The first step towards cost minimisation will be to decide on the number of drones that ought
to be produced at each of the manufacturing sites. In making this decision consideration has to be
taken to minimize the cost of production as well as the transport expenses (Hamila, Jukka, Vilko,
& Jyri, 2015). Currently the policy of the firm is to generate the goods at the various
manufacturing sites then transport them to the distribution centres prior to distributing the goods
to the final markets. The firm currently have an option of producing the drones in either Cairns,
Darwin or Mandurah. After the production is complete the goods are supposed to be transported
to either Adelaide or Newcastle as singe units or pallets (Gonzalo & Ignacio, 2010).
The model defined below is meant to obtain the most cost-efficient manufacturing site and
the means of transport that minimizes the cost of moving the products to the distribution centres.
3
the recent period the firm has experienced a rampant growth in the demand for its products
(Clodia, Angeloantonio, & Francesco, 2009). Even though their production capacity was flexible
enough and have managed to meet the new demands, the problem the firm is facing is the
increased transport cost. Initially drones were transported as single units but due to the
emergence of a new cheaper method that is transporting the drones as pallets consisting of 240
units, the management of Dronautics is reconsidering the supply chain network. Will therefore
model the most cost-effective supply chain and make recommendations that can assist the
Dronautics management minimize its operational cost (Gabriela & Jorge, 2011).
1. Selection of the optimal production sites
The first step towards cost minimisation will be to decide on the number of drones that ought
to be produced at each of the manufacturing sites. In making this decision consideration has to be
taken to minimize the cost of production as well as the transport expenses (Hamila, Jukka, Vilko,
& Jyri, 2015). Currently the policy of the firm is to generate the goods at the various
manufacturing sites then transport them to the distribution centres prior to distributing the goods
to the final markets. The firm currently have an option of producing the drones in either Cairns,
Darwin or Mandurah. After the production is complete the goods are supposed to be transported
to either Adelaide or Newcastle as singe units or pallets (Gonzalo & Ignacio, 2010).
The model defined below is meant to obtain the most cost-efficient manufacturing site and
the means of transport that minimizes the cost of moving the products to the distribution centres.
SUPPLY CHAIN MODELLING
4
Cost of transport from the manufacturing point to the
distribution centre
4
Cost of transport from the manufacturing point to the
distribution centre
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SUPPLY CHAIN MODELLING
5
Per Pallet ($) Per Unit
($)
Adelaide Newcastle Adelaide Newcastle
Cairns $790 $660 $6 $5
Darwin $530 $920 $4 $7
Mandurah $790 $1,190 $6 $9
Units moved to each distribution
centre
Per Pallet ($) Per Unit
($)
Adelaide Newcastle Adelaide Newcas
tle
Total units
produced
Cairns 0 0 0 0 0
Darwin 368 406 0 0 185870
Mandurah 0 0 0 0 0
Total 368 406 0 0
Equals Equals Equals Equals
Total Market supply 368 406 0 0
Total cost of supply to the
distribution centre
$568,819.1
7
Cost of production per unit
Plant cost
Cairns 43
Darwin 40
Mandurah 42
Total production cost $7,434,800
.00
Objective function
5
Per Pallet ($) Per Unit
($)
Adelaide Newcastle Adelaide Newcastle
Cairns $790 $660 $6 $5
Darwin $530 $920 $4 $7
Mandurah $790 $1,190 $6 $9
Units moved to each distribution
centre
Per Pallet ($) Per Unit
($)
Adelaide Newcastle Adelaide Newcas
tle
Total units
produced
Cairns 0 0 0 0 0
Darwin 368 406 0 0 185870
Mandurah 0 0 0 0 0
Total 368 406 0 0
Equals Equals Equals Equals
Total Market supply 368 406 0 0
Total cost of supply to the
distribution centre
$568,819.1
7
Cost of production per unit
Plant cost
Cairns 43
Darwin 40
Mandurah 42
Total production cost $7,434,800
.00
Objective function
SUPPLY CHAIN MODELLING
6
Production and transport to the distribution
centres
$8,003,619
.17
Constraints
Quantity Supplied to each
distribution point
Equals Total quantity from the point to the
market
From the model displayed above, it’s evident that the production cost is the major
component of the overall operation cost. Minimising this cost is thus the top priority for the firm.
From the model output the firm should only manufacture the drones at the Darwin centre. This
will mean incurring the minimal production cost of $ 7,434,800. After the completion of the
manufacturing process the goods should be transferred to either the Adelaide or the Newcastle
distribution centre in pallet packs (Niu, et al., 2013). In total 368 pallets need to be transferred
from Darwin to Adelaide while another 406 pallets be transported to Newcastle. From the
distribution points the goods will be efficient to supply the entire market (Motawa, Ibrahim,
Kaka, & Ammar, 2009).
The table below summarises the production and movement of goods to the distribution centres.
Units moved to each distribution centre
Per Pallet ($)
Adelaide Newcastle
Cairns 0 0
Darwin 368 406
Mandurah 0 0
Total 368 406
2. Market distribution network
6
Production and transport to the distribution
centres
$8,003,619
.17
Constraints
Quantity Supplied to each
distribution point
Equals Total quantity from the point to the
market
From the model displayed above, it’s evident that the production cost is the major
component of the overall operation cost. Minimising this cost is thus the top priority for the firm.
From the model output the firm should only manufacture the drones at the Darwin centre. This
will mean incurring the minimal production cost of $ 7,434,800. After the completion of the
manufacturing process the goods should be transferred to either the Adelaide or the Newcastle
distribution centre in pallet packs (Niu, et al., 2013). In total 368 pallets need to be transferred
from Darwin to Adelaide while another 406 pallets be transported to Newcastle. From the
distribution points the goods will be efficient to supply the entire market (Motawa, Ibrahim,
Kaka, & Ammar, 2009).
The table below summarises the production and movement of goods to the distribution centres.
Units moved to each distribution centre
Per Pallet ($)
Adelaide Newcastle
Cairns 0 0
Darwin 368 406
Mandurah 0 0
Total 368 406
2. Market distribution network
SUPPLY CHAIN MODELLING
7
The policy of the firm is to use the distribution centres to move the goods to various markets
as a way of enhancing efficiency (Sharma, Syendra, Bhat, & Anil, 2013). To this point we have
modelled the optimal production centre as well as the best way to move the goods to the
distribution points. It is now necessary to find a model that can give the best way to transport the
goods to the markets at the minimal cost. The tables below give a summary output of the optimal
model (Reefke, Ahmed, & Sundaram, 2014).
Cost of transport from the distribution centre to the markets
Per Pallet ($) Per Unit ($)
Adelaide Newcastle Adelaide Newcastle
Sydney $530 $130 $4 $1
Melbourne $460 $530 $4 $4
Brisbane $590 $330 $5 $3
Perth $860 $1,060 $7 $8
Adelaide $70 $590 $1 $5
Gold Coast Tweed Heads $590 $330 $5 $3
Newcastle-Maitland $590 $70 $5 $1
Canberra-Queanbeyan $460 $200 $4 $2
Sunshine Coast $660 $400 $5 $3
Wollongong $530 $200 $4 $2
Geelong $460 $530 $4 $4
Hobart $1,320 $1,580 $10 $12
7
The policy of the firm is to use the distribution centres to move the goods to various markets
as a way of enhancing efficiency (Sharma, Syendra, Bhat, & Anil, 2013). To this point we have
modelled the optimal production centre as well as the best way to move the goods to the
distribution points. It is now necessary to find a model that can give the best way to transport the
goods to the markets at the minimal cost. The tables below give a summary output of the optimal
model (Reefke, Ahmed, & Sundaram, 2014).
Cost of transport from the distribution centre to the markets
Per Pallet ($) Per Unit ($)
Adelaide Newcastle Adelaide Newcastle
Sydney $530 $130 $4 $1
Melbourne $460 $530 $4 $4
Brisbane $590 $330 $5 $3
Perth $860 $1,060 $7 $8
Adelaide $70 $590 $1 $5
Gold Coast Tweed Heads $590 $330 $5 $3
Newcastle-Maitland $590 $70 $5 $1
Canberra-Queanbeyan $460 $200 $4 $2
Sunshine Coast $660 $400 $5 $3
Wollongong $530 $200 $4 $2
Geelong $460 $530 $4 $4
Hobart $1,320 $1,580 $10 $12
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SUPPLY CHAIN MODELLING
8
Units transported to the various market centres
Adelaide Newcastle Adelaide NewcastleTotal supply Total demand
Sydney 0 209 0 0 50230 >= 50230
Melbourne 206 0 0 0 49360 >= 49360
Brisbane 0 103 0 0 24630 >= 24630
Perth 86 0 0 0 20590 >= 20590
Adelaide 56 0 0 0 13460 >= 13460
Gold Coast Tweed Heads 0 28 0 0 6790 >= 6790
Newcstle-Maitland 0 20 0 0 4870 >= 4870
Canberra-Queanbeyan 0 19 0 0 4580 >= 4580
Sunshine Coast 0 14 0 0 3330 >= 3330
Wollongong 0 13 0 0 3020 >= 3020
Geelong 11 0 0 0 2680 >= 2680
Hobart 10 0 0 0 2330 >= 2330
Total 368 406 0 0
Per Pallet ($) Per Unit ($)
Objective function
Total market distribution cost $273,979.17
Constraints
Total Supply >= Total demand
Distributed units is integer
Based on the model developed above its evident that transporting drones as units is very
expensive and thus the pallet method needs to be prioritized. The supply of the markets will be
either done from Newcastle or Adelaide based on the cost incurred to move the goods from
either of the distribution centre to the respective market. In summary the table below describes
away to supply the market from the distribution points (Sato-Silva, et al., 2015).
Per Pallet ($)
Adelaide Newcastle
Sydney 0 209
Melbourne 206 0
Brisbane 0 103
Perth 86 0
Adelaide 56 0
Gold Coast Tweed Heads 0 28
8
Units transported to the various market centres
Adelaide Newcastle Adelaide NewcastleTotal supply Total demand
Sydney 0 209 0 0 50230 >= 50230
Melbourne 206 0 0 0 49360 >= 49360
Brisbane 0 103 0 0 24630 >= 24630
Perth 86 0 0 0 20590 >= 20590
Adelaide 56 0 0 0 13460 >= 13460
Gold Coast Tweed Heads 0 28 0 0 6790 >= 6790
Newcstle-Maitland 0 20 0 0 4870 >= 4870
Canberra-Queanbeyan 0 19 0 0 4580 >= 4580
Sunshine Coast 0 14 0 0 3330 >= 3330
Wollongong 0 13 0 0 3020 >= 3020
Geelong 11 0 0 0 2680 >= 2680
Hobart 10 0 0 0 2330 >= 2330
Total 368 406 0 0
Per Pallet ($) Per Unit ($)
Objective function
Total market distribution cost $273,979.17
Constraints
Total Supply >= Total demand
Distributed units is integer
Based on the model developed above its evident that transporting drones as units is very
expensive and thus the pallet method needs to be prioritized. The supply of the markets will be
either done from Newcastle or Adelaide based on the cost incurred to move the goods from
either of the distribution centre to the respective market. In summary the table below describes
away to supply the market from the distribution points (Sato-Silva, et al., 2015).
Per Pallet ($)
Adelaide Newcastle
Sydney 0 209
Melbourne 206 0
Brisbane 0 103
Perth 86 0
Adelaide 56 0
Gold Coast Tweed Heads 0 28
SUPPLY CHAIN MODELLING
9
Newcastle-Maitland 0 20
Canberra-Queanbeyan 0 19
Sunshine Coast 0 14
Wollongong 0 13
Geelong 11 0
Hobart 10 0
One of the constraints in the model is that total supply should be able to meet the market
demand. This constraint help ensure goods moved to a particular market are enough to sustain
the current demand from the drones (Siddhartha & Sachan, 2016). This optimises sales hence
increases the overall profitability of the firm. The Adelaide distribution points is best suited to
supply Melbourne, Perth, Adelaide, Geelong and Hobart markets. The other remaining 7markets
are optimally supplied from the Newcastle distribution centre. This generated total operational
cost of $ 8, 2777,598 with $ 273,979 of the expense dedicated to distributing the goods to the
markets (Shwartz & Rivera, 2014).
3. Rationality of the distribution centre policy
Production is the basic operation of any manufacturing firm. However, upon completion of
the production process the firm need to device a way of taking the goods to the final consumers.
One way of effectively doing this is supplying the markets from centralized distribution centres.
The policy of Dronautics is to supply the drones’ market from two warehouses one in Adelaide
and another in Newcastle. This centralization of the distribution process policy has a number of
benefits to the organization. First the firm has a better control of the supply activities. The
distribution centres are responsible for the transportation of the inventory when required in
different locations. This way the production manager is allowed space to concentrate on
managing the production centres without having to worry about the market distribution. The
9
Newcastle-Maitland 0 20
Canberra-Queanbeyan 0 19
Sunshine Coast 0 14
Wollongong 0 13
Geelong 11 0
Hobart 10 0
One of the constraints in the model is that total supply should be able to meet the market
demand. This constraint help ensure goods moved to a particular market are enough to sustain
the current demand from the drones (Siddhartha & Sachan, 2016). This optimises sales hence
increases the overall profitability of the firm. The Adelaide distribution points is best suited to
supply Melbourne, Perth, Adelaide, Geelong and Hobart markets. The other remaining 7markets
are optimally supplied from the Newcastle distribution centre. This generated total operational
cost of $ 8, 2777,598 with $ 273,979 of the expense dedicated to distributing the goods to the
markets (Shwartz & Rivera, 2014).
3. Rationality of the distribution centre policy
Production is the basic operation of any manufacturing firm. However, upon completion of
the production process the firm need to device a way of taking the goods to the final consumers.
One way of effectively doing this is supplying the markets from centralized distribution centres.
The policy of Dronautics is to supply the drones’ market from two warehouses one in Adelaide
and another in Newcastle. This centralization of the distribution process policy has a number of
benefits to the organization. First the firm has a better control of the supply activities. The
distribution centres are responsible for the transportation of the inventory when required in
different locations. This way the production manager is allowed space to concentrate on
managing the production centres without having to worry about the market distribution. The
SUPPLY CHAIN MODELLING
10
distribution centre also allows for economical storage of the products as well as ease of accessing
the products from the markets (Soni, et al., 2014). The policy to operate two centralised
distribution centres is thus significant in cost minimization. Suppose the firm was to make some
changes to the policy, I will suggest they move the production sites to the distribution centres.
This way the firm can cut down the cost of transporting the products to the distribution enter as
well as enhance information flow from the distribution manager to the production manager. By
making this change am expecting the total cost of running the supply chain network to drop
significantly to the benefit of the company’s shareholders (Taghipour, Atour, Frayret, & Jean,
2013).
4. Breaking down of pallets
Allowing breaking down of pallets means goods transported to a specific market can be in
either pallet packs of 240 drones or less. This strategy allows the firm to eliminate any form of
transportation that involve moving the goods as single units to reduce the cost of transport. In the
model generated above, the firm is to transport the goods from the production point to the
distribution centres as pallets only. A similar technique is also applied in moving the drones from
the distribution centres to the markets. Being that the firm is already transporting in pallets only
the breaking down of the pallets will yield no cost advantage as the cost of transport is already at
its optimal points given the current operating policies and the market product demand (Wang, et
al., 2013).
5. Production relocation
Maintaining distribution points away from the production sites means incurring additional
transport charges. Also shifting the production points to the distribution centres means ensuring
10
distribution centre also allows for economical storage of the products as well as ease of accessing
the products from the markets (Soni, et al., 2014). The policy to operate two centralised
distribution centres is thus significant in cost minimization. Suppose the firm was to make some
changes to the policy, I will suggest they move the production sites to the distribution centres.
This way the firm can cut down the cost of transporting the products to the distribution enter as
well as enhance information flow from the distribution manager to the production manager. By
making this change am expecting the total cost of running the supply chain network to drop
significantly to the benefit of the company’s shareholders (Taghipour, Atour, Frayret, & Jean,
2013).
4. Breaking down of pallets
Allowing breaking down of pallets means goods transported to a specific market can be in
either pallet packs of 240 drones or less. This strategy allows the firm to eliminate any form of
transportation that involve moving the goods as single units to reduce the cost of transport. In the
model generated above, the firm is to transport the goods from the production point to the
distribution centres as pallets only. A similar technique is also applied in moving the drones from
the distribution centres to the markets. Being that the firm is already transporting in pallets only
the breaking down of the pallets will yield no cost advantage as the cost of transport is already at
its optimal points given the current operating policies and the market product demand (Wang, et
al., 2013).
5. Production relocation
Maintaining distribution points away from the production sites means incurring additional
transport charges. Also shifting the production points to the distribution centres means ensuring
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SUPPLY CHAIN MODELLING
11
an annual fixed cost that may end up ballooning the operation cost altogether. In this scenario it’s
therefore necessary to model a supply chain network that will account for all the costs and
generate the optimal course of decision to consider (Wang, et al., 2013). The model is displayed
below;
Cost of transport from the new manufacturing centre to the markets
Per Pallet ($) Per Unit ($)
Adelaide Newcastle Adelaide Newcastle
Sydney $530 $130 $4 $1
Melbourne $460 $530 $4 $4
Brisbane $590 $330 $5 $3
Perth $860 $1,060 $7 $8
Adelaide $70 $590 $1 $5
Gold Coast Tweed Heads $590 $330 $5 $3
Newcastle-Maitland $590 $70 $5 $1
Canberra-Queanbeyan $460 $200 $4 $2
Sunshine Coast $660 $400 $5 $3
Wollongong $530 $200 $4 $2
Geelong $460 $530 $4 $4
Hobart $1,320 $1,580 $10 $12
11
an annual fixed cost that may end up ballooning the operation cost altogether. In this scenario it’s
therefore necessary to model a supply chain network that will account for all the costs and
generate the optimal course of decision to consider (Wang, et al., 2013). The model is displayed
below;
Cost of transport from the new manufacturing centre to the markets
Per Pallet ($) Per Unit ($)
Adelaide Newcastle Adelaide Newcastle
Sydney $530 $130 $4 $1
Melbourne $460 $530 $4 $4
Brisbane $590 $330 $5 $3
Perth $860 $1,060 $7 $8
Adelaide $70 $590 $1 $5
Gold Coast Tweed Heads $590 $330 $5 $3
Newcastle-Maitland $590 $70 $5 $1
Canberra-Queanbeyan $460 $200 $4 $2
Sunshine Coast $660 $400 $5 $3
Wollongong $530 $200 $4 $2
Geelong $460 $530 $4 $4
Hobart $1,320 $1,580 $10 $12
SUPPLY CHAIN MODELLING
12
Units transported to the various market centres
Adelaide Newcastle Adelaide NewcastleTotal supply Total demand
Sydney 0 209 0 0 50230 50230
Melbourne 0 206 0 0 49360 49360
Brisbane 0 103 0 0 24630 24630
Perth 0 86 0 0 20590 20590
Adelaide 56 0 0 0 13460 13460
Gold Coast Tweed Heads 0 28 0 0 6790 6790
Newcstle-Maitland 0 20 0 0 4870 4870
Canberra-Queanbeyan 0 19 0 0 4580 4580
Sunshine Coast 0 14 0 0 3330 3330
Wollongong 0 13 0 0 3020 3020
Geelong 0 11 0 0 2680 2680
Hobart 10 0 0 0 2330 2330
Total 66 709 0 0
Per Pallet ($) Per Unit ($)
Total market distribution cost $306,315.83
Production cost Total
Adelaide 33 $521,070.00
Newcastle 32 $5,442,560.00
Total $5,963,630.00
Fixed annual cost 3000000
Objective function
Total operation cost $9,269,945.83
Constraints
Total supply >= Total demand
The model constraint is to match the supply with the level of demand. From the model
output it’s possible to note that operating two production centres one at Adelaide and another at
Newcastle will eliminate the cost of transporting the goods to the distribution centres (Charkha,
Pranav, Jaju, & Santosh, 2014). The total cost though has gone up from the initial value of
$8,277,598 which was modelled to the current $ 9,269,945 that has been generated by the model.
The fixed annual cost incurred have made the maintenance of the two production sites to be
economically non-practicable. The production cost has been reduced to just $ 5,963,630 from the
previous value of $7,434,800. The analysis of the decision indicate that it is cost efficient to
12
Units transported to the various market centres
Adelaide Newcastle Adelaide NewcastleTotal supply Total demand
Sydney 0 209 0 0 50230 50230
Melbourne 0 206 0 0 49360 49360
Brisbane 0 103 0 0 24630 24630
Perth 0 86 0 0 20590 20590
Adelaide 56 0 0 0 13460 13460
Gold Coast Tweed Heads 0 28 0 0 6790 6790
Newcstle-Maitland 0 20 0 0 4870 4870
Canberra-Queanbeyan 0 19 0 0 4580 4580
Sunshine Coast 0 14 0 0 3330 3330
Wollongong 0 13 0 0 3020 3020
Geelong 0 11 0 0 2680 2680
Hobart 10 0 0 0 2330 2330
Total 66 709 0 0
Per Pallet ($) Per Unit ($)
Total market distribution cost $306,315.83
Production cost Total
Adelaide 33 $521,070.00
Newcastle 32 $5,442,560.00
Total $5,963,630.00
Fixed annual cost 3000000
Objective function
Total operation cost $9,269,945.83
Constraints
Total supply >= Total demand
The model constraint is to match the supply with the level of demand. From the model
output it’s possible to note that operating two production centres one at Adelaide and another at
Newcastle will eliminate the cost of transporting the goods to the distribution centres (Charkha,
Pranav, Jaju, & Santosh, 2014). The total cost though has gone up from the initial value of
$8,277,598 which was modelled to the current $ 9,269,945 that has been generated by the model.
The fixed annual cost incurred have made the maintenance of the two production sites to be
economically non-practicable. The production cost has been reduced to just $ 5,963,630 from the
previous value of $7,434,800. The analysis of the decision indicate that it is cost efficient to
SUPPLY CHAIN MODELLING
13
relocate the production centres however the management of Dronautics need to do a farther
analysis on how to cut down the annual fixed cost to make the operation more profitable (Yue,
dajun, You, & Fengai, 2016). Looking at the production and market distribution table displayed
below, the following point can be noted.
Per Pallet ($)
Adelaide Newcastle
Sydney 0 209
Melbourne 0 206
Brisbane 0 103
Perth 0 86
Adelaide 56 0
Gold Coast Tweed Heads 0 28
Newcastle-Maitland 0 20
Canberra-Queanbeyan 0 19
Sunshine Coast 0 14
Wollongong 0 13
Geelong 0 11
Hobart 10 0
The model directs that most of the products be manufactured in Adelaide a factor which rises
from the low production cost per unit at this joint. Only goods supplied to Adelaide and Hobart
market are to originate from Adelaide. The overall observation is that the annual fixed cost spent
running the Adelaide production point have when distributed among the pallets produced does
not support economies of scale.
13
relocate the production centres however the management of Dronautics need to do a farther
analysis on how to cut down the annual fixed cost to make the operation more profitable (Yue,
dajun, You, & Fengai, 2016). Looking at the production and market distribution table displayed
below, the following point can be noted.
Per Pallet ($)
Adelaide Newcastle
Sydney 0 209
Melbourne 0 206
Brisbane 0 103
Perth 0 86
Adelaide 56 0
Gold Coast Tweed Heads 0 28
Newcastle-Maitland 0 20
Canberra-Queanbeyan 0 19
Sunshine Coast 0 14
Wollongong 0 13
Geelong 0 11
Hobart 10 0
The model directs that most of the products be manufactured in Adelaide a factor which rises
from the low production cost per unit at this joint. Only goods supplied to Adelaide and Hobart
market are to originate from Adelaide. The overall observation is that the annual fixed cost spent
running the Adelaide production point have when distributed among the pallets produced does
not support economies of scale.
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SUPPLY CHAIN MODELLING
14
6. Effects of the production relocation on the operation expenses
From the output of the model, relocating the production from Darwin to Adelaide and
Newcastle is not a viable idea. This is because taking this action will mean increasing the
business expenses by $ 992,347. The objective of the firms is to increase its profitability, which
is not supported by the relocation idea. So as to make the idea worth considering to the firm the
total annual fixed cost of running the two production points should not exceed $ 2,007,653. Any
value above this means the firm is incurring additional cost by relocating and the optimal
decision is to retain the current production point (Clodia, Angeloantonio, & Francesco, 2009).
7. Impact of production relocation on safety stock
Safety stock is the inventory kept by a firm so as to sustain product demand should supply of
goods be delayed by uncertainties. The uncertainties affecting the supply line are increased when
the transport line is long. In the first scenario the products have to move from production points
located in other regions to the distribution centres. This meant there was a need to maintain high
safety stock hence the firm needed to maintain high operating capital. Relocating the production
centre means inventory is easily obtained. The firm will thus have to maintain only a small
volume of safety stock just to accommodate issues affecting the production system (Bilgen,
Bilge, & Yelda, 2013).
8. Another possible scenario
Instead of building two production points one at Newcastle and the other at Adelaide, the
firm should consider relocating it entire production to Newcastle and distributing its products
directly from Newcastle to the various respective markets. The model below gives the outcome
that this decision will yield in terms of cost of running the supply chain (Bottani, et al., 2015).
14
6. Effects of the production relocation on the operation expenses
From the output of the model, relocating the production from Darwin to Adelaide and
Newcastle is not a viable idea. This is because taking this action will mean increasing the
business expenses by $ 992,347. The objective of the firms is to increase its profitability, which
is not supported by the relocation idea. So as to make the idea worth considering to the firm the
total annual fixed cost of running the two production points should not exceed $ 2,007,653. Any
value above this means the firm is incurring additional cost by relocating and the optimal
decision is to retain the current production point (Clodia, Angeloantonio, & Francesco, 2009).
7. Impact of production relocation on safety stock
Safety stock is the inventory kept by a firm so as to sustain product demand should supply of
goods be delayed by uncertainties. The uncertainties affecting the supply line are increased when
the transport line is long. In the first scenario the products have to move from production points
located in other regions to the distribution centres. This meant there was a need to maintain high
safety stock hence the firm needed to maintain high operating capital. Relocating the production
centre means inventory is easily obtained. The firm will thus have to maintain only a small
volume of safety stock just to accommodate issues affecting the production system (Bilgen,
Bilge, & Yelda, 2013).
8. Another possible scenario
Instead of building two production points one at Newcastle and the other at Adelaide, the
firm should consider relocating it entire production to Newcastle and distributing its products
directly from Newcastle to the various respective markets. The model below gives the outcome
that this decision will yield in terms of cost of running the supply chain (Bottani, et al., 2015).
SUPPLY CHAIN MODELLING
15
Develop only one processing firm in Newcastle
Cost of transport from Newcastle manufacturing center to the markets
Newcastle (pallets) Newcastle (units)
Sydney $130 $1
Melbourne $530 $4
Brisbane $330 $3
Perth $1,060 $8
Adelaide $590 $5
Gold Coast Tweed Heads $330 $3
Newcastle-Maitland $70 $1
Canberra-Queenbeyan $200 $2
Sunshine Coast $400 $3
Wollongong $200 $2
Geelong $530 $4
Hobart $1,580 $12
Units transported to the various market centres
Newcastle (pallets) Newcastle (units) Total supply Total demand
Sydney 209 70 50230 >= 50230
Melbourne 205 160 49360 >= 49360
Brisbane 102 150 24630 >= 24630
Perth 85 190 20590 >= 20590
Adelaide 56 20 13460 >= 13460
Gold Coast Tweed Heads 28 70 6790 >= 6790
Newcstle-Maitland 20 70 4870 >= 4870
Canberra-Queanbeyan 19 20 4580 >= 4580
Sunshine Coast 13 210 3330 >= 3330
Wollongong 12 140 3020 >= 3020
Geelong 11 40 2680 >= 2680
Hobart 9 170 2330 >= 2330
Total 769 1310
Total market dictribution cost $340,685.00
Production cost Total
15
Develop only one processing firm in Newcastle
Cost of transport from Newcastle manufacturing center to the markets
Newcastle (pallets) Newcastle (units)
Sydney $130 $1
Melbourne $530 $4
Brisbane $330 $3
Perth $1,060 $8
Adelaide $590 $5
Gold Coast Tweed Heads $330 $3
Newcastle-Maitland $70 $1
Canberra-Queenbeyan $200 $2
Sunshine Coast $400 $3
Wollongong $200 $2
Geelong $530 $4
Hobart $1,580 $12
Units transported to the various market centres
Newcastle (pallets) Newcastle (units) Total supply Total demand
Sydney 209 70 50230 >= 50230
Melbourne 205 160 49360 >= 49360
Brisbane 102 150 24630 >= 24630
Perth 85 190 20590 >= 20590
Adelaide 56 20 13460 >= 13460
Gold Coast Tweed Heads 28 70 6790 >= 6790
Newcstle-Maitland 20 70 4870 >= 4870
Canberra-Queanbeyan 19 20 4580 >= 4580
Sunshine Coast 13 210 3330 >= 3330
Wollongong 12 140 3020 >= 3020
Geelong 11 40 2680 >= 2680
Hobart 9 170 2330 >= 2330
Total 769 1310
Total market dictribution cost $340,685.00
Production cost Total
SUPPLY CHAIN MODELLING
16
Newcastle 32 $5,947,840.00
Fixed annual cost 1500000
Objective function
Total operation cost $7,788,525.00
Constraints
Total Supply >= Total demand
Units Supplied are integers
The total operation cost yielded by the model is $ 7, 788,525. This is lower compared to
the initial model which yielded a total cost of over $ 8.2 million. For the firm to optimise its
profitability it is recommended that the management of Dronautics do consider shifting the
production centre from Darwin to Newcastle. Even though the fixed annual cost increases the
cost of operation, the lower cost of production per unit and the reduced cost of distributing
product to the market makes the option to be the most viable idea (Charkha, Pranav, Jaju, &
Santosh, 2014).
16
Newcastle 32 $5,947,840.00
Fixed annual cost 1500000
Objective function
Total operation cost $7,788,525.00
Constraints
Total Supply >= Total demand
Units Supplied are integers
The total operation cost yielded by the model is $ 7, 788,525. This is lower compared to
the initial model which yielded a total cost of over $ 8.2 million. For the firm to optimise its
profitability it is recommended that the management of Dronautics do consider shifting the
production centre from Darwin to Newcastle. Even though the fixed annual cost increases the
cost of operation, the lower cost of production per unit and the reduced cost of distributing
product to the market makes the option to be the most viable idea (Charkha, Pranav, Jaju, &
Santosh, 2014).
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SUPPLY CHAIN MODELLING
17
References
Acar, Yavuz, Kadipasaoglu, Sukran, Schipperijn, & Peter. (2010). A decision support framework
for global supply chain modelling: an assessment of the impact of demand, supply and
lead-time uncertainties on performance. International Journal of Production Research, 1-
10.
Alzaman, & Chaher. (2014). Green supply chain modelling: literature review. International
Journal of Business Performance and Supply Chain Modelling, 1.
Bilgen, Bilge, & Yelda. (2013). Integrated production scheduling and distribution planning in
dairy supply chain by hybrid modelling. The Journal of Annals of Operations Research,
1-9.
Bottani, Eleonora, Montanari, Roberto, Rinaldi, Marta, . . . Giuseppe. (2015). Modeling and
multi-objective optimization of closed loop supply chains: A case study. Computers &
Industrial Engineering, 2.
Charkha, Pranav, G., Jaju, & Santosh, B. (2014). Supply chain performance measurement
system: an overview. International Journal of Business Performance and Supply Chain
Modelling, 5.
Clodia, V., Angeloantonio, R., & Francesco, P. (2009). Shaping Sustainable Value Chains:
Network Determinants of Supply Chain Governance Models. Journal of Business Ethics,
2-9.
Gabriela, C., & Jorge, M. M. (2011). Mathematical modeling for simultaneous design of plants
and supply chain in the batch process industry. Journal of Computers & Chemical
Engineering, 21-23.
Gonzalo, G., & Ignacio, G. (2010). A global optimization strategy for the environmentally
conscious design of chemical supply chains under uncertainty in the damage assessment
model. Journal of Computers & Chemical Engineering, 2-9.
Hamila, Jukka, Vilko, & Jyri. (2015). The development of a service supply chain model for a
manufacturing SME. The International Journal of Logistics Management, 1-10.
Motawa, Ibrahim, Kaka, & Ammar. (2009). Modelling payment mechanisms for supply chain in
construction. Engineering Construction and Architectural Management, 2.
17
References
Acar, Yavuz, Kadipasaoglu, Sukran, Schipperijn, & Peter. (2010). A decision support framework
for global supply chain modelling: an assessment of the impact of demand, supply and
lead-time uncertainties on performance. International Journal of Production Research, 1-
10.
Alzaman, & Chaher. (2014). Green supply chain modelling: literature review. International
Journal of Business Performance and Supply Chain Modelling, 1.
Bilgen, Bilge, & Yelda. (2013). Integrated production scheduling and distribution planning in
dairy supply chain by hybrid modelling. The Journal of Annals of Operations Research,
1-9.
Bottani, Eleonora, Montanari, Roberto, Rinaldi, Marta, . . . Giuseppe. (2015). Modeling and
multi-objective optimization of closed loop supply chains: A case study. Computers &
Industrial Engineering, 2.
Charkha, Pranav, G., Jaju, & Santosh, B. (2014). Supply chain performance measurement
system: an overview. International Journal of Business Performance and Supply Chain
Modelling, 5.
Clodia, V., Angeloantonio, R., & Francesco, P. (2009). Shaping Sustainable Value Chains:
Network Determinants of Supply Chain Governance Models. Journal of Business Ethics,
2-9.
Gabriela, C., & Jorge, M. M. (2011). Mathematical modeling for simultaneous design of plants
and supply chain in the batch process industry. Journal of Computers & Chemical
Engineering, 21-23.
Gonzalo, G., & Ignacio, G. (2010). A global optimization strategy for the environmentally
conscious design of chemical supply chains under uncertainty in the damage assessment
model. Journal of Computers & Chemical Engineering, 2-9.
Hamila, Jukka, Vilko, & Jyri. (2015). The development of a service supply chain model for a
manufacturing SME. The International Journal of Logistics Management, 1-10.
Motawa, Ibrahim, Kaka, & Ammar. (2009). Modelling payment mechanisms for supply chain in
construction. Engineering Construction and Architectural Management, 2.
SUPPLY CHAIN MODELLING
18
Niu, Jian, Zhao, Jun, Xu, Zuhua, . . . Jixin. (2013). Model predictive control with dynamic
pricing and probability inventory of a single supply chain unit. Asia-Pacific Journal of
Chemical Engineering, 1.
Reefke, H., Ahmed, M. D., & Sundaram, D. (2014). Sustainable Supply Chain Management--
Decision Making and Support: The SSCM Maturity Model and System. Journal Global
Business Review, 2-10.
Sato-Silva, Wladimir, Nadal-Roig, Esteve, Gonzalez-Araya, Marcela, C., & PLa-Aragones.
(2015). Operational research models applied to the fresh fruit supply chain. European
Journal of Operational Research, 1-10.
Sharma, Syendra, K., Bhat, & Anil. (2013). An empirical exploration of supply chain design
factors and their influence on supply chain performance. International Journal of
Business Performance and Supply Chain Modelling, 2-10.
Shwartz, J. D., & Rivera, D. E. (2014). A control-relevant approach to demand modeling for
supply chain management. Computers & Chemical Engineering, 23-26.
Siddhartha, & Sachan, A. (2016). Review of agile supply chain implementation frameworks.
International Journal of Business Performance and Supply Chain Modelling, 1-10.
Soni, Umang, Jain, Vipul, Kumar, & Sameer. (2014). Measuring supply chain resilience using a
deterministic modeling approach. Journal of Computers & Industrial Engineering, 1-10.
Taghipour, Atour, Frayret, & Jean, M. (2013). Coordination of operations planning in supply
chains: a review. International Journal of Business Performance and Supply Chain
Modelling, 2-9.
Wang, Ting, R., Lan, Qiang, G., Chu, & Yong, Z. (2013). Supply Chain Financing Model: Based
on China's Agricultural Products Supply Chain. Journal of Applied Mechanics and
Materials, 1-10.
Yue, dajun, You, & Fengai. (2016). Stackelberg-game-based modeling and optimization for
supply chain design and operations: A mixed integer bilevel programming framework.
Journal of Computers & Chemical Engineering, 2.
18
Niu, Jian, Zhao, Jun, Xu, Zuhua, . . . Jixin. (2013). Model predictive control with dynamic
pricing and probability inventory of a single supply chain unit. Asia-Pacific Journal of
Chemical Engineering, 1.
Reefke, H., Ahmed, M. D., & Sundaram, D. (2014). Sustainable Supply Chain Management--
Decision Making and Support: The SSCM Maturity Model and System. Journal Global
Business Review, 2-10.
Sato-Silva, Wladimir, Nadal-Roig, Esteve, Gonzalez-Araya, Marcela, C., & PLa-Aragones.
(2015). Operational research models applied to the fresh fruit supply chain. European
Journal of Operational Research, 1-10.
Sharma, Syendra, K., Bhat, & Anil. (2013). An empirical exploration of supply chain design
factors and their influence on supply chain performance. International Journal of
Business Performance and Supply Chain Modelling, 2-10.
Shwartz, J. D., & Rivera, D. E. (2014). A control-relevant approach to demand modeling for
supply chain management. Computers & Chemical Engineering, 23-26.
Siddhartha, & Sachan, A. (2016). Review of agile supply chain implementation frameworks.
International Journal of Business Performance and Supply Chain Modelling, 1-10.
Soni, Umang, Jain, Vipul, Kumar, & Sameer. (2014). Measuring supply chain resilience using a
deterministic modeling approach. Journal of Computers & Industrial Engineering, 1-10.
Taghipour, Atour, Frayret, & Jean, M. (2013). Coordination of operations planning in supply
chains: a review. International Journal of Business Performance and Supply Chain
Modelling, 2-9.
Wang, Ting, R., Lan, Qiang, G., Chu, & Yong, Z. (2013). Supply Chain Financing Model: Based
on China's Agricultural Products Supply Chain. Journal of Applied Mechanics and
Materials, 1-10.
Yue, dajun, You, & Fengai. (2016). Stackelberg-game-based modeling and optimization for
supply chain design and operations: A mixed integer bilevel programming framework.
Journal of Computers & Chemical Engineering, 2.
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