Six months from now, the decision will look strange. ‘Why on earth did we pick the more expensive contractor?’ If the reason was not captured, you have two bad options: trust a vague memory, or re-litigate the whole question. The cure costs one sentence at decision time: not just what you chose, but why.
Decisions detach from reasons by default
The outcome gets written down because it is actionable—the reasoning stays in the conversation that produced it. Later, the outcome is all that remains, stripped of the constraint that forced it: the deadline that existed, the budget that did not, the person who was unavailable.
Capture the because in one sentence
‘Chose Kowalski—more expensive, but the only one who could start before September.’ That is a complete decision record: choice, tradeoff, deciding constraint. Spoken into a voice memo after the call, it takes ten seconds.
- Name the alternative you rejected.
- Name the constraint that decided it.
- Note who agreed, if the decision was shared.
Keep the materials within reach
The estimate photo, the comparison thread, the voice memo with your doubts—linked to the decision note, they turn ‘I think we had reasons’ into an inspectable case file. This matters most in disputes: memory softens, but the dated photo of the quote does not.
Reasons make revisiting honest
When circumstances change, a preserved reason tells you whether the decision should change too. ‘We chose it for the September start’ is re-examinable the moment September slips. Without the reason, every revisit starts from zero—and usually just re-runs the old argument with worse data.
Record the choice, the rejected alternative, and the constraint that decided it—then link the evidence. One sentence now spares you the same argument every six months.