Project Quality Inputs
Use the form below to compare baseline and current performance.
Plotly Graph
The chart compares improvement percentages across the quality dimensions used in the index.
Example Data Table
| Metric | Baseline | Current | Weight | Direction | Example Improvement |
|---|---|---|---|---|---|
| Defects per Release | 12 | 7 | 30 | Lower is better | 41.67% |
| Rework Cost | 9000 | 5400 | 20 | Lower is better | 40.00% |
| Cycle Time | 28 | 22 | 20 | Lower is better | 21.43% |
| Satisfaction Score | 78 | 86 | 15 | Higher is better | 10.26% |
| Compliance Score | 82 | 93 | 15 | Higher is better | 13.41% |
Using these sample values produces a Quality Improvement Index of approximately 28.34%.
Formula Used
1) Improvement for lower-is-better metrics
Improvement % = ((Baseline - Current) / Baseline) × 100
2) Improvement for higher-is-better metrics
Improvement % = ((Current - Baseline) / Baseline) × 100
3) Normalized weight
Normalized Weight = Metric Weight / Sum of All Metric Weights
4) Quality Improvement Index
QII = Σ (Improvement % × Normalized Weight)
5) Composite Quality Score
Composite Score = 100 + QII
How to Use This Calculator
- Enter baseline project quality values for defects, rework cost, cycle time, satisfaction, and compliance.
- Enter the current values for the same metrics.
- Assign weights based on project priorities. Larger weights increase metric influence.
- Press Calculate Index to display results above the form.
- Review the weighted contributions to identify which metric drives the final index most.
- Use the Plotly chart for a quick visual comparison.
- Download the summary as CSV or PDF for reporting.
FAQs
1) What does the Quality Improvement Index measure?
It summarizes weighted change across several quality-related project metrics. The final percentage helps you see whether overall quality performance improved or declined from the baseline.
2) Why are weights included?
Weights let you emphasize the metrics that matter most. For example, a regulated project may give more weight to compliance, while a delivery-focused project may stress cycle time.
3) Can the index be negative?
Yes. A negative result means the weighted quality picture worsened against the baseline. It signals that corrective action may be needed in one or more high-priority areas.
4) Should the weights add up to 100?
They do not have to. The calculator automatically normalizes the weights. You can enter any positive mix, and the tool converts them into proportional importance.
5) Which metrics should use lower-is-better logic?
Defects, rework cost, and cycle time usually use lower-is-better logic. Satisfaction and compliance often use higher-is-better logic because stronger scores indicate better performance.
6) Is this calculator suitable for portfolio reporting?
Yes, if teams agree on consistent metric definitions. A standardized structure makes the index useful for project reviews, quality dashboards, and trend comparisons.
7) What is a good Quality Improvement Index value?
That depends on your target and operating environment. In many settings, any positive index is encouraging, while double-digit improvement often indicates meaningful performance gains.
8) Can I use different quality metrics?
Yes. The model works best when metrics are measurable, comparable over time, and aligned with project goals. You can adapt the formula structure to other controlled quality indicators.