In Agile Scrum, user story estimation is the process of assessing the effort required to implement a user story. The goal is to help the team understand the relative complexity, risk, and size of each task so they can plan and prioritize effectively.
🛠️ Common Estimation Techniques
1. Story Points (most common)
-
A relative measure of effort (not tied to hours or days).
-
Typically use a Fibonacci sequence (1, 2, 3, 5, 8, 13, etc.) to reflect increasing uncertainty as complexity grows.
-
Factors considered: complexity, risk, unknowns, amount of work.
2. Planning Poker
-
Team members estimate a story by playing cards with point values.
-
Everyone reveals their card at once, then discuss differences.
-
Repeated until consensus is reached.
3. T-shirt Sizes
-
Use sizes like XS, S, M, L, XL to indicate rough sizing.
-
Often used in early backlog grooming or with non-technical stakeholders.
4. Bucket System
-
Stories are sorted into "buckets" of effort (e.g., 1, 2, 3, 5, 8 points) through collaborative team discussion.
📦 Example User Story:
“As a user, I want to reset my password so that I can regain access if I forget it.”
Team might discuss:
-
Is it a standard workflow?
-
Any third-party integration (e.g., email)?
-
Edge cases (token expiration, security)?
-
Level of test coverage needed?
After discussion, team agrees it’s a 5-point story.
✅ Best Practices
-
Estimate as a team, not individually.
-
Keep estimates relative (compare stories against each other).
-
Don’t equate story points directly to hours.
-
Re-estimate if requirements change significantly.
No comments:
Post a Comment