Overview
Planning Poker (also called Scrum Poker) is a consensus-based agile estimation technique where team members use numbered cards to estimate the effort or complexity of user stories or tasks. The method combines expert judgment with team discussion to produce more accurate estimates than individual assessments.
How It Works
The Process:
- Product Owner presents a user story
- Team discusses and asks clarifying questions
- Each member privately selects an estimate card
- All cards revealed simultaneously
- Discuss differences, especially extremes
- Re-estimate until consensus reached
- Record final estimate and move to next story
Card Values:
- Typically uses Fibonacci sequence: 0, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89
- Also includes: ∞ (too large), ? (unknown), ☕ (break needed)
- Non-linear scale reflects increasing uncertainty
- Can use t-shirt sizes (XS, S, M, L, XL) alternatively
Key Principles
Anonymous Estimation:
- Prevents anchoring bias
- Reduces influence of senior team members
- Encourages independent thinking
- Ensures all voices heard equally
Discussion-Based:
- Divergent estimates trigger conversation
- Surfaces hidden assumptions
- Shares knowledge across team
- Builds shared understanding
- Achieves buy-in through participation
Relative Sizing:
- Estimates are relative, not absolute
- Compare to reference stories
- Focus on complexity, not hours
- Account for unknowns and risk
Benefits
Improved Accuracy:
- Wisdom of crowds effect
- Multiple perspectives reduce blind spots
- Discussion reveals missing information
- Team buy-in improves commitment
Team Building:
- Shared understanding of work
- Knowledge transfer during discussion
- Equal voice for all team members
- Builds estimation capability
Efficiency:
- Faster than detailed individual estimates
- Engages whole team simultaneously
- Identifies items needing breakdown
- Creates shared baseline
Best Practices
- Time-box discussions (2-5 minutes per story)
- Focus on largest estimate discrepancies
- Have team re-estimate, not average cards
- Use reference stories for calibration
- Break down stories estimated > 13
- Track velocity to improve accuracy over time
- Don't convert points directly to hours
Common Variations
- Async Planning Poker: Digital tools for distributed teams
- Quick Poker: Simplified for time-sensitive situations
- Modified Fibonacci: Different number sequences
- Affinity Estimation: Group similar stories first
- Physical card decks
- PlanningPoker.com
- Scrum Poker apps
- Zoom/Teams integrations
- Jira Planning Poker plugin
Use Cases
- Sprint planning in Scrum
- Backlog refinement
- Project estimation
- Capacity planning
- Risk assessment
