I am old enough that I have both observed and given presentations on clear film with an old school overhead projector. I was thinking about time and visualizing time and studying statistical process control and using charts to help with decision making. Suddenly, I had a perfectly clear visual of a stack of overhead film with run chart plots overlaid with each other for comparing data.
Statistical Process Control, specifically Run Charts (a line graph where a measure is plotted over time), are useful tools that allow us to:
- Display data to make process performance visible
- Determine if a change