Organizations that subscribe to the Lean or Six Sigma business methodology, and others that are devoted to continuous improvement, often use a host of visual management tools to achieve consistency and introduce positive change. Kanban, huddle boards, and value stream maps are all very popular and effective. Process control charts are another valuable visual management tool for recognizing and reacting to process variation.
Here are the details about why they are so useful.
Statistical Process Control
It is probably helpful to begin with a definition of process. A process is quite simply anything that gets done. It could be putting gas in your car, filling out a time sheet, delivering source code to QA, or checking in a patient. Each of these activities results in some output. Sometimes it is a product, but often it is a service or a deliverable to the next process. In addition to the result of the process, data is also generated. Statistical process control is the act of using that data to make the process better. The data might be related to timeliness, cost, quality, or quantity.