Literature Review of Project Delivery Models

Literature Review of Project Delivery Models
Contents
Introduction................................................................................................................................1
Delivery Models.........................................................................................................................1
Design-Bid-Build...................................................................................................................2
Construction Management Multi-Prime (CM MP)................................................................3
Construction Management-at-Risk (CMAR).........................................................................3
Design-Build (DB).................................................................................................................4
Integrated Project Delivery.....................................................................................................5
References..................................................................................................................................6
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Literature Review of Project Delivery Models
Introduction
Project delivery in construction projects involves planning, designing, construction, and
project management services like organizing, planning, execution and management. A typical
project involves three key internal including owner, designer, and developer that have major
impacts on the project outcome. They need to take critical decisions on the project such as
method of procurement to use, contract types to develop and delivery method to use. When
taking decisions about the delivery systems, these stakeholders may have different
perspectives as every delivery system may have different set of advantages and disadvantages
for each of them.
Delivery Models
Common types of delivery systems used worldwide are design bid build construction
management multi-prime, construction management at risk, design build, design build
operate/maintain, and an integrated project delivery model. Some benefits provided by a
specific delivery model could be associated with all the three types of stakeholders but there
are no absolute values. A design-build project would have a positive impact on the project
schedule which can benefit all. Integrated Product Delivery (IPD) increases process
efficiencies as well as reduce the risks of litigation. Thus, it is seen as the best delivery
system by many contractors. Based on the different perspectives of the people on these
benefits decision can be taken on which delivery model to use on a project. Any delivery
model that is chosen must try to reduce the wastage on the project and may even be changed
if currently used delivery system is causing wastage (Fischer, Reed, Khanzode, & Ashcraft,
2012).
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Literature Review of Project Delivery Models
Design-Bid-Build
Figure 1: Design-bid-build
This is the traditional method of delivery system in which separate contracts are created for
separate project participants. In Design-Bid-Build model of project delivery, two types of
contracts are formed, one for the architect and other for a main contractor to take care of
other deliveries. The work follows a linear sequence on this project and thus have advantages
like low cost and greater control over design. A typical design-build project would follow a
linear sequence of execution starting with engagement of a qualified engineer, and then
designing, obtaining bids for execution, and engaging contractor for project completion.
There can also be some variations from this sequence such as addition of performance
measures during designing and building of contractors based on performance specifications
(Beck group, 2015).
However, because of this linearity, the project can be very time consuming to execute. Also,
the project owner is responsible for any cost changes on the project and the contractor may
not have any say on it. Thus, the contract favours the owner more than the contractor
(Rawlins & Godwin, 2015).
The selection of right designer is critical for such a project as remining project stages would
largely depend on the efficiency of the project design. Thus, an engineer involved in this
work is carefully selected considering certifications of quality standards, experience, vendor
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