Constraint-based estimating starts
by looking at the end date of the project and, working
backwards, looks for the costs and time resources required to
complete the project by that date.
The key features of cost-based
estimating are:
Click
Find the date when the project
must be completed
Subtract 20% (that's your
contingency)
Find the budget limit within
which the project must be completed
Find the labour resources that
will, in practice, be available to the project
Calculate the overall project
time and costs limits and apportion them to the various
tasks
If the task is not feasible,
look for another way of completing the project
