Project Management

Velocity Stability Index

Analyze sprint velocity consistency with a normalized stability index.

Last validated: 2026-02-14

Velocity Stability Index quantifies variation in completed work across recent sprints. It is useful for judging forecast reliability and identifying process instability. The tool helps separate random fluctuation from structural delivery issues. Use it to tune planning confidence and improvement priorities.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

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

How to use this tool

Enter completed velocity values for recent sprints.
Run index calculation to measure consistency.
Use the trend to adjust forecasting confidence and commitments.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

Velocities: 28, 31, 26, 29, 30, 27
Sprints count: 6
Standard deviation: 1.8708286933869707
Coefficient of variation percent: 6.564311204866563
Stability index: 93.43568879513344
Stability band: high

Expected Outputs

Parsed velocities 0: 28
Parsed velocities 1: 31
Parsed velocities 2: 26
Parsed velocities 3: 29

Interpretation

Parsed velocities 0 is 28.0. Use this as a decision input, not as a standalone conclusion.
Parsed velocities 1 is 31.0. Use this as a decision input, not as a standalone conclusion.
Parsed velocities 2 is 26.0. Use this as a decision input, not as a standalone conclusion.
Cross-check the result against one alternate input set to validate sensitivity.

Scenario Compare (A vs B)

Use this to compare two input sets and quantify change in key outputs.

Scenario A

Velocities

Sprints count

Standard deviation

Coefficient of variation percent

Stability index

Stability band

Scenario B

Velocities

Sprints count

Standard deviation

Coefficient of variation percent

Stability index

Stability band

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