What it is
A 1-pager that defines user, context, problem, why now, impact, and constraints. Forces the team to align on the problem before solutioning.
Concrete example
“Techs often arrive unprepared; 22% of jobs require return visits. Opportunity: improve pre-job information flow to reduce callbacks by 30%.”
When to use it
Before scoping any feature larger than a small fix. Whenever someone says “let's just build it.”
What Product Joi delivers
1-page opportunity brief: user, context, problem, evidence, why now, expected lift, success metric, constraints, out-of-scope.
Turnaround
48 hours
Format
Decision-first doc
Reviewed by
Senior product lead