ADM 3301 Lecture 25: Untitled 5

• School: University of Ottawa
• Department: Administration
• Course: ADM 3301
• Professor: Davood Astaraky

Document Summary

> for point beyond control limit - correct the immediate problem, conduct root cause analysis. Or recognize exceptional performance, figure out ways to replicate. > observe patterns - recalculate and recalibrate control limits as necessary if something changed in the process. > the main task in spc is to distinguish assignable from random variation. Taking a sample of two or more observations and calculating a sample statistic (such as sample mean) makes the task easier. This is because random variations are reduced in sample statistics. > the variability of a sample statistic is described by its sampling distribution, which is the theoretical distribution of the values of the statistic for all possible samples of a given size from the process. > the sampling distribution of the sample mean exhibits less variability (i. e. , it is less spread out) than the process distribution.