What separates a PSA from a project tool
Both show tasks and dates, and that similarity is why the comparison usually goes wrong. The difference is that a project tool models work and a PSA models the business around the work: who is available, what an hour costs, what it sells for, and what remains once the two are compared.
The practical test is simple. Ask what happens when a project runs two weeks late. A project tool moves the bars. A PSA moves the bars, shows which other projects lose the people, recalculates the margin, and flags the invoice that will now slip into the next quarter.
- Cost and rate attached to every hour recorded
- Availability recalculated when a project moves
- Project margin visible while the project runs
- Billing consequences of a delay made explicit