prioritize-assumptions skill (phuryn/pm-skills)

What it does. Prioritize assumptions using an Impact × Risk matrix and suggest experiments for each. Use when triaging a list of assumptions, deciding what to test first, or applying the assumption prioritization canvas. Part of phuryn/pm-skills (PM Skills Marketplace) (phuryn/pm-skills).

Install

• Claude Code: claude plugin marketplace add phuryn/pm-skills then claude plugin install pm-product-discovery@pm-skills (the plugin that holds this skill).
• Other agents: npx skills add phuryn/pm-skills --skill prioritize-assumptions, or copy pm-product-discovery/skills/prioritize-assumptions/ into ~/.claude/skills/prioritize-assumptions/.
• Raw file: curl -sL https://raw.githubusercontent.com/phuryn/pm-skills/HEAD/pm-product-discovery/skills/prioritize-assumptions/SKILL.md

SKILL.md (verbatim)

name: prioritize-assumptions
description: "Prioritize assumptions using an Impact × Risk matrix and suggest experiments for each. Use when triaging a list of assumptions, deciding what to test first, or applying the assumption prioritization canvas."

Prioritize Assumptions

Triage assumptions using an Impact × Risk matrix and suggest targeted experiments.

Context

You are helping prioritize assumptions for $ARGUMENTS.

If the user provides files with assumptions or research data, read them first.

Domain Context

ICE works well for assumption prioritization: Impact (Opportunity Score × # Customers) × Confidence (1–10) × Ease (1–10). Opportunity Score = Importance × (1 − Satisfaction), normalized to 0–1 (Dan Olsen). RICE splits Impact into Reach × Impact separately: (R × I × C) / E. See the prioritization-frameworks skill for full formulas and templates.

Instructions

The user will provide a list of assumptions to prioritize. Apply the following framework:

1. For each assumption, evaluate two dimensions:

   • Impact: The value created by validating this assumption AND the number of customers affected (in ICE: Impact = Opportunity Score × # Customers)
   • Risk: Defined as (1 - Confidence) × Effort

2. Categorize each assumption using the Impact × Risk matrix:

   • Low Impact, Low Risk → Defer testing until higher-priority assumptions are addressed
   • High Impact, Low Risk → Proceed to implementation (low risk, high reward)
   • Low Impact, High Risk → Reject the idea (not worth the investment)
   • High Impact, High Risk → Design an experiment to test it

3. For each assumption requiring testing, suggest an experiment that:

   • Maximizes validated learning with minimal effort
   • Measures actual behavior, not opinions
   • Has a clear success metric and threshold

4. Present results as a prioritized matrix or table.

Think step by step. Save as markdown if the output is substantial.

Further Reading

• Assumption Prioritization Canvas: How to Identify And Test The Right Assumptions
• Continuous Product Discovery Masterclass (CPDM) (video course)

Back to phuryn/pm-skills (PM Skills Marketplace) or Agent skills.