hardCase StudyScenarioMidSeniorStaffLead
How do you turn an effort estimate into a delivery date you would defend, and what do you do when the sales lead has already promised an earlier one?
5 min readUpdated 2026-08-15
Answer
Short answer
Convert effort to duration through explicit productive capacity, then check it against the critical path and the customer's dependencies, because dates are often bound by sequence rather than effort.
Use estimation as the thread through the turning an effort estimate into a explanation: name the signal, then say what changes when it moves.
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Likely follow-ups
- The customer offers to fund three more engineers to hit the earlier date. What do you tell them?
- How would you phase the delivery so the promised date has something real on it?
- What do you put in the assumptions section to protect a date that depends on their test environment?
- You are overruled and the earlier date is committed. What do you do in the first two weeks of delivery?
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