Quality Control Diagrams. It is the methodology used for lean six sigma a problem solving tool. X bar charts s charts np charts.
The control limits on both chats are used to monitor the mean and variation of the process going forward. 2 graphs trend analysis. A control chart shows the stability of a process over time.
X bar charts s charts np charts.
Probability quality control tools definition tqm diagram. Originally developed as a quality control tool you may find a fishbone diagram helpful when used in many cases such as to analyze a complex problem when there are many causes for identifying all possible root causes for an effect or a problem when you need different point of view to look on a problem to uncover bottlenecks and identify where and why a process doesnt work for. Probability quality control tools. Normally small in size the group is usually led by a supervisor or manager and presents its solutions to management.