Product Manager

Purpose

Prevent premature feature explosion by forcing an idea through problem definition and risk ranking before scope is decided — so the MVP is the smallest thing that actually tests the riskiest assumption, not a wish list.

When to use

• A vague or ambitious product idea needs to become a scoped, buildable plan.
• Asked to write a PRD, define an MVP, or turn "we should build X" into user stories and success metrics.

When NOT to use

• The feature is already fully specified (clear scope, clear acceptance criteria) — go straight to feature-to-production.
• The question is a pure technology choice with no user-facing product dimension — that's research-to-decision.

Required inputs

• The idea or request, however rough.
• Whatever's known about the target user/context — ask if genuinely unknown rather than inventing a persona wholesale.

Workflow

1. Idea/request — capture it as stated, without immediately jumping to solution details.
2. Problem definition — what problem is this actually solving, for whom? If the request is already a solution ("add a dashboard"), work backward to the underlying problem before accepting the solution as given.
3. Target user — who specifically has this problem? Avoid "everyone."
4. Jobs-to-be-done — what is the user actually trying to accomplish, independent of any specific feature?
5. Pain / current alternatives — how do they solve this today, and what's wrong with that? A problem with no real current pain is a weak foundation for a feature.
6. Assumptions — list what must be true for this to be worth building (usage frequency, willingness to change behavior, technical feasibility).
7. Risk ranking — rank assumptions by (a) how likely they are to be wrong and (b) how costly it is if they are. The riskiest, cheapest-to-test assumption drives the MVP scope — not the most exciting feature.
8. Hypotheses — turn the riskiest assumptions into falsifiable statements ("users will complete checkout 20% more often if we remove this step") that the MVP/experiment can actually test.
9. MVP scope — the smallest version that tests the top hypothesis. Actively resist scope growth: if a feature doesn't test the hypothesis or serve the core job-to-be-done, cut it from v1 regardless of how easy or appealing it seems.
10. User stories — concrete, testable stories for the MVP scope only.
11. Success metrics — how will you know if the hypothesis was right? Tie directly to the hypothesis from step 8, not a vanity metric.
12. Experiment design — how the MVP will actually be evaluated (A/B test, cohort comparison, qualitative feedback threshold) — see research-to-decision's references/ for rigor on this if it's a formal experiment.
13. PRD — the durable artifact combining the above (see output contract).

Tool & resource guidance

If usage/behavioral data already exists that bears on the risk ranking (step 7) or could establish a real baseline for the success metric (step 11), that's a data-scientist task — don't guess at numbers a dataset could actually answer.

Output contract

Using the templates in assets/:

• PRD (assets/prd-template.md) — problem, users, MVP scope, stories, metrics, non-goals.
• User stories (assets/user-story-template.md) for each MVP-scope story.
• Success metrics (assets/metrics-template.md).
• Experiment plan (assets/experiment-template.md) if a formal test/rollout is warranted.
• Decision log (assets/decision-log-template.md) for major scope decisions and why they were made (especially what was cut and why).

Quality checks

• The MVP scope is traceable to the single riskiest hypothesis, not a collection of "nice to have while we're at it" features.
• Every user story in scope is testable and tied to the core job-to-be-done.
• Success metrics are specific and tied to the hypothesis, not generic ("increase engagement").
• At least one thing was explicitly cut from scope and recorded in the decision log — if nothing was cut, scope discipline probably wasn't actually applied.

Edge cases

• User already has a fully-formed feature spec: don't force the full workflow — validate the MVP-scoping and risk-ranking steps briefly, then move to feature-to-production.
• No clear target user yet: make defining one step 1 of the actual deliverable rather than picking one arbitrarily and proceeding.
• Stakeholder pressure for a large v1: state the risk-ranking-based case for the smaller MVP explicitly in the decision log rather than silently capitulating to scope growth.

References

See examples/collaborative-playlist-prd.md for a full worked example.