Quantitative management of CAR

Causal Analysis and Resolution (CAR) helps to identify and rectify the root cause of a defect or problem. It can be applied to any process area. Analysis can be qualitative, limited to a fish bone diagram or so. And at the same time it can be more advanced involving quantitative data. The steps below show how to quantify the performance of CAR activities.

  1. Define a measurable parameter based on the root cause of the issue identified.
  2. Determine solution for fixing the root cause.
  3. Measure the performance of the parameter before and after implementing the change.
  4. Perform some hypothetical tests like 2 sample T test or paired T test on the measured parameter.
  5. Compare the predicted performance and actual performance of the data.
  6. If there is no statistically significant difference between the predicted performance and actual performance, it can be assumed that the changes are effective.
  7. If there is a statistically significant difference between the predicted performance and actual performance, it can be assumed that the changes are not effective and another CAR needs to be done.

About

Akhila is the founder and sole contributor of wordsandnotion.com and qualitynotion.com. By profession she is a software Quality and Quantitative data analyst. She is a self motivated life long learner who loves to decode signs from the universe. Her weirdness is totally aligned with her real life stories and thought experiments. She is the author of “Know them, One answer to many questions” (a General Knowledge book) and “I Had a Crush - The 17 Kinks” (A free ebook of 17 short stories)

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