Assessment Inputs
Use scores from 1 to 5. Higher values mean stronger lean maturity, stronger business importance, and stronger evidence confidence.
Example Data Table
This sample shows how a productivity team could populate the model before calculating the final maturity result.
| Dimension | Score | Weight | Evidence | Gap to 4.2 | Priority Index |
|---|---|---|---|---|---|
| Leadership Commitment | 3.8 | 5.0 | 4.5 | 0.4 | 2.20 |
| Value Stream Flow | 3.1 | 5.0 | 3.5 | 1.1 | 7.15 |
| Standard Work | 3.0 | 4.0 | 3.0 | 1.2 | 6.72 |
| Visual Management | 2.7 | 3.0 | 2.5 | 1.5 | 6.75 |
| Problem Solving & Kaizen | 3.4 | 5.0 | 4.0 | 0.8 | 4.80 |
| Employee Engagement | 3.6 | 4.0 | 4.0 | 0.6 | 3.84 |
| Quality at Source | 3.2 | 5.0 | 4.0 | 1.0 | 6.00 |
| Metrics & Daily Management | 2.9 | 4.0 | 3.0 | 1.3 | 7.28 |
| Example Confidence-Adjusted Score | 3.27 / 5 | ||||
Formula Used
1) Weighted Raw Score
Weighted Raw Score = Σ(Score × Weight) ÷ Σ(Weight)
2) Confidence-Adjusted Score
Confidence-Adjusted Score = Σ(Score × Weight × Evidence/5) ÷ Σ(Weight)
3) Lean Maturity Index
Lean Maturity Index (%) = (Confidence-Adjusted Score ÷ 5) × 100
4) Gap to Target
Gap to Target = max(Target Maturity − Dimension Score, 0)
5) Priority Index
Priority Index = Gap × Weight × (1 + ((5 − Evidence) ÷ 5))
6) Alignment Index
Alignment Index = 100 − ((Max Score − Min Score) ÷ 4 × 100)
This design rewards strong performance, emphasizes strategic importance, and discounts weak evidence so the final score stays more realistic.
How to Use This Calculator
Enter the organization name, department, assessor, date, team size, improvement horizon, target maturity, and benchmark score. Then score each lean dimension from 1 to 5.
Set a business weight for each dimension. Use higher weights for categories that matter more to throughput, quality, customer outcomes, or management control.
Set the evidence confidence score from 1 to 5. Use lower evidence when ratings are based on opinion rather than audits, measurements, observed routines, or trend data.
Press Assess Lean Maturity. The page will show the result above the form, including the maturity index, stage, benchmark gap, charts, and a ranked priority list.
Use the CSV and PDF buttons to export a record of the assessment for workshops, governance reviews, quarterly check-ins, or improvement planning sessions.
FAQs
1) What does this calculator measure?
It measures how well lean practices are deployed across leadership, flow, standard work, visual control, problem solving, engagement, quality, and daily management.
2) Why are weights included?
Weights reflect business importance. A weak area with a higher operational impact should influence the final result more than a lower-impact weakness.
3) Why does evidence confidence matter?
Evidence confidence reduces overrating. If a score is based on limited proof, the adjusted result becomes more conservative and realistic.
4) How often should lean maturity be reviewed?
Quarterly works well for most teams. Fast-changing operations may review monthly, while stable functions can assess maturity every six months.
5) What is considered a strong result?
A score above 4.0 usually indicates strong discipline. Scores between 3.0 and 4.0 often show good basics with clear improvement opportunities.
6) Can different departments be compared?
Yes. Use the same scoring criteria, target score, and evidence standards. That keeps comparisons more consistent and more actionable.
7) What should happen after the assessment?
Review the top priority dimensions, assign owners, define actions, set timing, and reassess later to confirm whether the roadmap improved maturity.
8) Is this suitable for workshops and audits?
Yes. It works well for leadership reviews, kaizen planning, team retrospectives, internal audits, and capability benchmarking across functions.