Is a sample size of 50 sufficient to perform a capability study?

Sample sizes are dependent upon the data type (discrete data requires more than continuous), the desired precision (+/- 2 minutes or =/- 2%, etc.) and the variation in the data (measured as standard deviation for continuous data and % defective for discrete). We’ll have a separate webinar to address sampling but I hope that helps…

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Elisabeth Swan

Elisabeth is a Master Black Belt at GoLeanSixSigma.com, the co-author of The Problem-Solver’s Toolkit and co-host of the Just-in-Time Cafe. For over 30 years, she's helped leading organizations like Amazon, Charles Schwab and Marriott International, Inc. build problem-solving muscles with Lean Six Sigma to achieve their goals.