- Discuss and agree on the work that needs to be done.
- Document the assumptions.
- Start with the most likely result and create three-point range estimates.
Even if some members of the group don’t have deep expertise in the project’s work, their presence may help to uncover unstated assumptions. It can also help to build team commitment to the effort estimates and team understanding. There are other ways to estimate three-point ranges. Some project managers attempt to speed up the development of a 3-point range estimate by asking only for two numbers?the most probable and some form variance (e.g.,?10).