Control
Control Chart Builder
Build chart-specific SPC analyses with frozen baselines and documented special-cause signals.
Analyze · Interactive CI tool
Process Capability Analysis
Process Capability compares measured process variation with explicit specification limits, using indices and distribution diagnostics under stated assumptions.
Read freely. Creating a worksheet requires a verified free beta account. No payment or manual beta approval.
When this tool helps
Use it after reviewing measurement quality, process stability, sampling and the suitability of a distribution model.
It helps a team assess how a supported process model relates to an agreed requirement, beyond looking only at an average.
When to choose another method
Use a Control Chart first if stability is uncertain. Use CTQC to agree the requirement instead of inventing specification limits from the observed data.
How to use it in CI Tools
- Read the guide and agree the question, definitions and required starting information.
- Open a separate blank worksheet or the built-in synthetic practice sample. Follow the tool-specific steps and review its warnings.
- Check the interpretation and save an editable .citools file to your computer. Keep reports as separate exports.
Fictional example snapshot
Synthetic component length
A fictional stable process is assessed under a supported normal model.
| Specifications / estimates | LSL 9.5 mm, USL 10.5 mm; mean 10.1 mm, within SD 0.1 mm |
|---|---|
| Illustrative Cp | (10.5 − 9.5) / (6 × 0.1) = 1.67 |
| Illustrative Cpk | min((10.5 − 10.1)/0.3, (10.1 − 9.5)/0.3) = 1.33 |
These figures illustrate the method; they are not clinical instructions, universal targets or verified results from a real organization.
Read the complete worked example and its interpretationLearn the method, then put it into practice
The full guide includes prerequisites, interface-specific steps, two fictional examples, common mistakes and interpretation help. It is available without registration.
Process Capability Analysis: guide & examplesOpen Process Capability AnalysisRelated improvement tools
Define
CTQ Tree Builder (CTQC)
Turn customer needs into clear, measurable requirements and operational definitions.
Measure
Data Collection Plan
Carry CTQC definitions into practical collection methods, sampling plans and ownership.