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The control chart is an online graph used to study how a process changes over time. The control chart was invented by Walter A. Shewhart. Guidelines for Control Chart: A control chart always has a central line for the average, an upper line for the upper control limit and a lower line for the lower … Read more
Cause and Effect Diagram A cause and effect diagram is a graphical tool to identify possible causes of a problem or effect. It is one of the basic tools of 7 QC Tools. The cause and effect diagram analysis was first developed by Professor Kaoru Ishikawa of Japan in 1960. The cause and effect diagram … Read more
Check Sheet The check sheet is a systematic and organized method of collecting data in a simple table form for analysis of the process. It is also called a Tally sheet. It is one of the basic 7 QC Tools. Uses of check sheet: When to use a Check Sheet? Check Sheet Procedure : Benefits … Read more