From the course: Process Improvement Foundations
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How to measure process improvement
From the course: Process Improvement Foundations
How to measure process improvement
- All the time, you should be questioning the data. Ask yourself if the person giving the numbers has a reason to be biased. How reliable is their source? Could it be happening by chance? Are they looking at the whole picture? And we be sure that A caused B? So these are my five tests of information. Number one, is it likely to be biased? Number two, is it a number or a ratio? Number three, is it significant? In other words, could it have happened by chance? Does the number vary so much from one time period to the next, this could easily just be a chance blip? And what aren't they measuring? And finally, can we be sure that one thing really did cause the other? Causation is particularly tricky. Often, numbers are related, so that if one goes up, the other one goes up. But they aren't actually causing each other, there's just a common cause. For example, children from educated homes are more likely to read, and…
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