The business case comes before the feature case
Roadmaps drift because scope decisions are argued in the language of features instead of outcomes.
Every feature request arrives with a built-in justification: a user asked, a competitor shipped, the team is excited. None of those are business cases.
A business case names the outcome it moves — revenue, retention, cost, trust, risk — states the current baseline, and commits to the signal that would show movement.
Why this discipline protects engineering
Teams do not burn out from hard problems; they burn out from work whose value nobody can explain. Tying scope to outcomes gives engineers a reason to defend a decision and a reason to stop.
It also makes cutting scope politically survivable. You are not rejecting someone's idea — you are declining an unfunded outcome.
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