Lets define types of actions!
Statistical Process Control involves different types of actions. To sum up in short way, while applying SPC to company’s real process the following actions was taken:
- Taking actions on the process. This comprises the Voice of the Process identification by using Control Charts. It can be considered as a first step to process improvement as it recognize assignable causes of variation.
- Taking actions on the process outcomes. This involves the Voice of the Customer identification. Here a person needs to separate acceptable outcomes from unacceptable.
- Taking actions to align the two voices. As a result of two previous actions, now a person seeks to compare the voice of the process with voice of the customer.
To my mind, this is a basis of SPC and those simple actions can be applied to almost any process. Now, I can easily understand those people in the companies, who put every action on control charts – I try to do the same with all figures that I find.