QAPP CI · SUPPORTING CI METHOD
Heijunka
Level volume and mix to reduce scheduling-induced variation and stabilise flow.
When it helps
Level volume and mix to reduce scheduling-induced variation and stabilise flow.
Data and preparation
Demand, mix, capacity, pitch, constraints and planning horizon
Practical workflow
- Separate real demand from internally created fluctuation.
- Calculate realistic capacity and pace.
- Define the levelling pattern and frozen window.
- Test the impact on WIP and changeovers.
- Review rules when demand/capacity change.
What QAPP records
| Before | During | After |
|---|---|---|
| Scope, baseline, ownership, evidence | Actions, timestamps, observations, exceptions | Result, effectiveness, standard update, follow-up |
Connection to AIAG
This is a supporting Continuous Improvement method, not an AIAG Core Tool. In QAPP, findings can feed a CQI-20/8D problem-solving workflow and, when the process risk/control changes, trigger review of PFMEA, Control Plan, MSA/SPC or other applicable Core Tool records.
Interpretation limits
Do not use the tool as a ritual. Define a measurable problem, baseline and decision rule, then verify whether the change improved the process without creating another risk.