weights in procurement plan
In the Open Standard
Sharjeel FaizMember for 11 years 6 months
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Why do we use weights to calculate procurement progress?
Say, the tender assigns percentages to each stage. E.g., inquiries, 10%; TBE, 20%; PO, 30%; approvals, 20%; inspection, 20%; dispatch, 10%.
I take a simple example
Suppose there are three items to order and PO cost is as follows.
Pipes, 1000$; pump, 4000$; and pressure vessel, 5000$.
Total project cost equals the sum of the individual cost i.e., 1000+4000+5000=10,000$.
Unit weight for any item equals PO cost divided by total project cost.
Pipe unit weight = 1000/10000=0.1.
Pump unit weight = 4000/10000=0.4.
Vessel unit weight = 5000/10000 = 0.5
If pipes, pump and vessel is 100% complete,
pipe progress =100% x 0.1 x 10000 = 1000
pump progress = 100% x 0.4 x 10000 =4000
vessel progress = 100% x 0.5 x 10000 = 5000
Total 1000+4000+5000=10000.
I get the same answer if I do not use weights. E.g. If I am 100% complete, I can claim 1000$ from owner.
I hope I am clear. I am not a planner, just interested.
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