Project Compression Strategies
Added on 2020-05-16
6 Pages1338 Words58 Views
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a.Determine accurate measured material quantities using appropriate units of measurement for the item of work :Table 1: Concrete work ITEMS Unit Quantity Concrete placement M3224Floor finishingM2109Rebar worksM3125Floor fabrication kgs113Table 2: Masonry ITEMSUnitQuantity Glazed tiles M2106Brickwork M2242Plaster wall and ceiling M2120Vinyl Floor tileM232NB: the excel sheets attached provides the activity precedence diagram and the critical path is established using the method of critical path method where zero float activities are the candidates for inclusion in the critical path network. b.Determine appropriate productivity constants for the item of work The productivity constant for a Mason in brickwork laying is given as (Scribd, 2018) 1.0hrs per m2 and for Metal work is 0.8hrs per m2.c.Determine tradesman hours worked In Masonry, for example, placement of reinforced concrete on slabs: Labour= 1.3hrs per m3For 150 slab- 107m3 (allow 12% waste) hence = 107+107x0.12= 119.84m3Therefore trades man hours worked= 119.84/1.3= 92.18 hrsd.Determine a suitable gang sizeGang size n= Q/PwWhere n= number of workers, Q= quantity of work, and W= work duration, P= productivity (in m3/hr)= 113/(1.3-1 x 24x6) = 1.02 roughly 2 men e.Determine time needed to complete the task. For the 1st task, the productivity constant: Rebar works for ground floor is 0.14kgs per hr
The total amount of work available to do ground floor = 125Hence time needed to complete work= 125 x 0.14x 5= 87.5hrs = 3.65days For task 2, the productivity constant: Glazed tiles are 6.0sqr meter per hrHence time to complete work = 6.0 x 106= 636hrs= 26.5 days f.Review the task shown in the project and verify its sequence and the duration allowed. Would you make any changes? If so what would you change, and why? This is a perfect job scheduling since the predecessor must be allowed sufficient time to curebefore the task can set in. Afterwards task 1 is simply a continuation of predecessor hence this is okay. In the second task selected, (Glazed tiles), the predecessor activity is task 23 takes 2 days while the activity that follows the selected task is a continuation of the said task as we move to the next level. This is also a perfect scheduling strategy since the basement needs to be ready and adequate to carry the elements of windows and doors otherwise it would be impossible to accomplish this task without the predecessor task being done first. 2Critique the program provided – find and discuss any inconsistencies that you can find. Would you ask for changes to be made, and why? In the section of waterproofing, it should have been scheduled earlier not later when masonry is already done. Sound waterproofing requires that consideration be made right at the time of sinking the foundation walls and piers: unfortunately in this case, the foundation was done without much consideration to waterproofing. Secondly, the program does not include acoustic requirements yet it is also critical for effective building performance; that should have been factored in perhaps as one of the finishing construction elements. The program also seems to be highly inflexible given the almost time dependent lineated activities, in other words, there are more activities that are dependent on the predecessor
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