To calculate how many user stories can be assigned in a 2-week sprint

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 To calculate how many user stories can be assigned in a 2-week sprint with 3 developers and 1 QA, where each developer works 6 hours per day, we need to consider the total available hours and how many story points the team can realistically complete.

Example Calculation

Assumptions:

  • Sprint Duration: 2 weeks (10 working days).
  • Work Hours per Day per Developer: 6 hours.
  • Total Developer Hours: 3 developers × 6 hours/day × 10 days = 180 hours.
  • Work Hours per Day for QA: 6 hours.
  • Total QA Hours: 6 hours/day × 10 days = 60 hours.
  • Average Velocity: Assume the team typically completes 25 story points per sprint.

Estimating User Stories

  1. Allocate Story Points to Developers:

    • Let’s assume each story is 5 story points. If each story requires approximately 30 developer hours (5 story points/story), the developers could handle 6 stories:
    180 developer hours30 hours per story=6 stories\frac{180 \text{ developer hours}}{30 \text{ hours per story}} = 6 \text{ stories}

  2. QA Capacity:

    • If each story requires about 10 QA hours for testing, the QA can handle 6 stories in 60 hours.
    60 QA hours10 hours per story=6 stories\frac{60 \text{ QA hours}}{10 \text{ hours per story}} = 6 \text{ stories}

Since both the developers and QA can handle 6 stories, you can assign 6 user stories to the sprint, totaling 30 story points.

Final Notes:

  • This assumes all stories are of equal size (5 story points) and the estimates are accurate.
  • Adjust based on any known variability in story sizes or unexpected tasks.

This estimation balances developer and QA workload, allowing smooth progress through the sprint.

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