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Previously Asked Questions

What is standard deviation and how do I compute it?

What is the Relationship between Process Stability and Process Capability?

How do I test my data for normality?

What is the philosophy of Process Control (rather than Product Control)?

What is the difference between specification limits and control limits?

My company is instituting Lean systems. What is SPC's role, if any, in the world of Lean Manufacturing? Is SPC 'lean'? Part 2

My company is instituting Lean systems. What is SPC's role, if any, in the world of Lean Manufacturing? Is SPC 'lean'? Part 1

What is the Cpm index and how does it relate to Cpk?

Why is Cpk data important and how can my company benefit from tracking it?

Can I chart deviation-from-target and when would it make sense to do this?

Can control charts detect small process shifts?

What does an out-of-control process indicate?

What's the difference between Cpk and Ppk?

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