B A 360 Chapter Notes - Chapter 6S: Statistical Process Control, Central Limit Theorem, Control Chart
Document Summary
Statistical process control (spc) - application of statistical techniques to ensure that processes meet standards. All processes are subject to a certain degree of variability. Process is said to be operating in statistical control when the only source of variation is common causes. Process must first be brought into statistical control by detecting and eliminating special causes of variation. Then its performance is predictable, and its ability to meet customer expectations can be assessed. Objective is to provide a statistical signal when assignable cause of variation are present. Nurtural variations - many sources of variation that occur within a process, even one that is in statistical control. Form a pattern that can be described as a distribution. As long as it remains within specified limits, the process is said to be in control. Assignable variation - variation in a production process that can be traced to specific causes. Natural and assignable variations distinguish two tasks for the operations manager:
