The economic layer a task tool does not model
Classic project tools model tasks, dependencies and dates. On a time-and-materials engagement what has to be modelled is different: who works, at what rate, for how many hours and against which contract. Without that economic layer the plan can be perfectly on schedule while the margin deteriorates unseen.
The usual result is an organization keeping the plan in one tool, hours in another and the margin calculation in a spreadsheet someone rebuilds every month. It works with five projects; with twenty-five it stops working and different versions of the same number appear depending on who prepares the report.
- Rates by role and client tied to the current contract
- Hours booked to project, activity and approval period
- Consumption against budget visible during the project
- Margin calculated with the real cost of assigned people