First steps
- Keep few KPIs with clear owners.
- Plot them over time with limits.
- React only on signals, with actions.
How to measure success
Share of KPIs on target and open actions. Record the value before you start, so the effect of every action can be shown.
When these methods are the wrong choice
- Management review: Daily operational problems.
- Turtle diagram: Product defects.
- SPC control charts: Characteristics without a capable gauge or with too few data.
- Cost of poor quality (COPQ): Root cause analysis.
The methods in one line
| Method | What it is |
|---|---|
| Management review | Top management reviews the QMS results, risks and resources and decides actions. |
| Turtle diagram | Describes one process with inputs, outputs, resources, people, methods and KPIs. |
| SPC control charts | Separates common-cause from special-cause variation and tells the operator when to react. |
| Cost of poor quality (COPQ) | Puts a money value on scrap, rework, sorting, warranty and complaints to set priorities. |