MGT 3501 Lecture Notes - Lecture 11: Standard Deviation, Statistical Process Control, Six Sigma
Document Summary
What is the potential to create defects before mass production starts. Shows how well the parts being produced fit into the range specified by the design specifications. Cpk larger than 1 indicates process is capable. Cpk smaller or equal to 1 indicates not capable. Two calculation, and take minimum of each. Getting six sigma is very hard to do. Most companies are at 4 to 5 range. If given 1 million points plotted on control chart, 233 were outside of sl, then it has a sigma level of 5. Nothing we can do, the process is as we can get it. Try to find the root cause of the variation, and make the process tighter. Note: this doesn"t improve the quality of the product or service, just changes the metric it is being measured against! Sl comes from the design product and what the customers feel for a sl that"s acceptable for the product.
