The role of Cost-Benefit analysis in Project Constraints
Possibly a companys most valuable asset is Time, in terms of business this can have a monetary value (staff salaries). From this perspective we can see that there are several influences on the cost for a project; Time to complete, Setup costs (hardware, equipment), Maintenance costs, and Opportunity lost (time that could be spent doing other things).
In order to put these costs into perspective, it is necessary to calculate a budget for the project, from this we can set constraints on both time and money that the project can make use of.
If we know when the project is due to recover expenses (Payback Point, mentioned earlier), and what expenses can be predicted, we can compare this information to the upper limits of the organization. From this we could set lower (more realistic) constraints.