If you have ever compared two machines, two shifts, or two suppliers and found yourself saying “well, their standard deviation is bigger, but they’re also making a bigger part, so is that really worse?”, you were reaching for the Coefficient of Variation, even if you didn’t know its name yet. The Coefficient of Variation (CV) (more…)
Sample size determination is the mathematical estimation of the number of population units considering for the study.
Learning how to define a process is one of the critical aspects of identifying the improvement project or problem-solving projects.
The F-distribution tests equality of variances between two normal populations, and explains its properties and how it relates to the F-test.
Value Stream Analysis is the step after mapping: examining the map to find bottlenecks, wait times, and waste, and turning them into concrete improvements.