# First service: assumption and evidence log

Blank working document. Unfilled fields are unknown, not completed checks. This is an editorial planning aid, not verified research or a promise of results. Keep private customer or personal details out of copies you share.

## Customer, situation and proposed deliverable

Not recorded.

## One uncertain assumption

Not recorded.

## Why this assumption changes the decision

Not recorded.

## Planned observation and scope

Not recorded.

## Inputs, responsibilities and endpoint

Not recorded.

## Decision criteria written before the test

Not recorded.

## Evidence actually collected with date/source

Not recorded.

## Alternative explanations

Not recorded.

## What remains unknown

Not recorded.

## Decision: continue / narrow / change / postpone / stop

Not recorded.

## Next check and revision date

Not recorded.

Guide: https://www.jinchenggeo.com/entrepreneurship/validate-first-service/