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Control Chart Analysis Reaction

There is a wide range of non-random patterns that require action. When the presence of a special cause is suspected, the following actions should be taken (subject to local instructions).

1. CHECK

Check that all calculations and plots have been accurately completed, including those for control limits and means. When using variable charts, check that the pair (x bar, and R bar) are consistent. When satisfied that the data is accurate, act immediately.

2. INVESTIGATE

Investigate the process operation to determine the cause.

Use tools such as:

Brainstorming

Cause and Effect

Pareto Analysis

Your investigation should cover issues such as:

The method and tools for measurement

The staff involved (to identify any training needs

Time series, such as staff changes on particular days of the week

Changes in material

Machine wear and maintenance

Mixed samples from different people or machines

Incorrect data, mistakenly or otherwise

Changes in the environment (humidity etc.)

	The. Deming PDCA Cycle	QMS Implementation	FMEA Information	APQP Information
Auditing Information	8-D Problem Solving	Statistics	Error Proofing (Poka Yoke)	Brainstorming
Identifying Waste	Pull Systems	Lead Time Reduction	Planned Maintenance	Quick Setup
Discovering Change	Process Capability - Cp vs. Cpk	Histogram. Animation	Process Loop Animation	Taguchi Loss Function
		Fishbone / Cause and Effects Animation

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