Have you identified all sources of variation on the flow diagram?

• Have all sources of information been used to define the cause of the problem?

• Do you have the physical evidence of the problem?

• Can you establish a relationship between the problem and the process?

• Do you continually challenge the potential root causes with the question �why� followed with �because� to construct alternatives?

• What are the is / is not distinctions?

• Is this a unique situation or is the likely problem similar to a past experience?

• Has a comparison analysis been completed to determine if the same or similar problem existed in related products?

• What are the experiences of recent actions that may be related to this problem?

• Why might this have occurred?

• Why haven�t we experienced this problem before?

Potential Causes - Some Questions

	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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