Planning & Productivity Planning model

Velocity Stability Index

Analyze sprint velocity consistency with a normalized stability index.

Velocity Stability Index summarizes how much completed work varies across recent sprints. Use it to spot whether a team's velocity history is steady enough for planning or too volatile to support a single-point forecast.

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Input guidance

Enter recent sprint velocities in order.

How to use this tool

Enter recent sprint velocities in order.
Run the calculation and review the stability signal.
Interpret the result alongside scope changes, team changes, holidays, and blocked work.

Velocity Inputs

Enter sprint velocities as comma-separated values.

Result

Sprints analyzed: 6

Average velocity: 28.50

Std deviation: 1.87

Coefficient of variation: 6.56%

Stability index: 93.44 / 100

Stability band: High

Formula or method

Parsed sprint velocities are averaged to calculate mean velocity.
Standard deviation uses sample variance when at least two velocity values are present.
Coefficient of variation is standard deviation divided by mean velocity; stability index is 100 times one minus that coefficient, bounded from 0 to 100.

How to interpret the result

Review the task assumptions, timing, handoffs, and output labels before using the result in a larger workflow.

Review note and limitations

Planning results depend on the assumptions, capacity, timing, and handoff rules entered by the user.
Use the output as decision support, then confirm constraints and human factors before changing commitments.

Related tools and workflows

Related planning tools help compare schedule, capacity, dependency, timing, or workflow assumptions around the same task. Start with Burndown Forecast Calculator, Critical Path Estimator, and Earned Value Calculator when you need a quick follow-up check.

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