KEVOS® WORKOS · Improvement
Before and After Comparison
Did the change actually improve the process?
Compares cycle time, unit cost and defect rate before and after a change and flags mixed results.
Open the calculatorRuns in your browser. No account needed.
How this tool works
Inputs, units and where to find them
| Input | Unit | Typical source |
|---|---|---|
| Before cycle time | min | Measured cycle time before |
| After cycle time | min | Measured cycle time after |
| Before cost / unit | $ | Unit cost before |
| After cost / unit | $ | Unit cost after |
| Before defect rate | % | Defect rate before |
| After defect rate | % | Defect rate after |
Method and formulas
- Percentage change = (before − after) ÷ before
- Defect change in percentage points
Limitations
- No statistical test; small samples may mislead
Typical uses
- Confirming an improvement
- Reporting project results
Who it is for
- Improvement teams
- Managers reviewing results
What you get
- IMPROVED, MIXED RESULT, UNCHANGED or WORSE
- Change table
Interpreting the result
- A mixed result needs investigation before standardising
WORKOS tools are screening and decision-support utilities. Verify important financial, engineering, safety, legal or operational decisions using appropriate professional standards and your organisation’s approved data.
