Why your improvement efforts aren't driving better results: The faÃ§ade of lean and Six Sigma
John Dyer, president of JD&A, writes: "I once had a plant manager tell me his factory had implemented Six Sigma, but there was not a single statistical process control chart. How is that possible? Another had the control charts in place but refused to allow the operator to shut the process down when it indicated an out-of-control condition."
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