Using a Process Behavior Chart to Prove that Improvement Has Occurred
How do you trend infrequently occurring data?
The best way that we have found (and the technique we teach in the 2-Day TapRooT® Trending to Manage Performance Course) is the Process Behavior Chart (example shown above).
What does the example above show? That the time between incidents with a particular root cause has increased significantly and stabilized at a new, more infrequent level. It changed from an average of 15 days between incidents with this root cause to an average of 60 days between incidents.
Would you like to learn to draw these charts using Excel? Then register for the course and the TapRooT® Summit here:
https://summit.taproot.com/register
Or register for just the course here:
https://www.taproot.com/store/2-Day-Trending-Houston-TX-Mar-11-2019-Pre-Summit.html
A chart that shows time between incidents with a particular root cause? I don’t get it. What about their process performance.
Alternatives are Crow-AMSAA plots (my favourite) and Process Reliability plots.