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Primary Metric

Primary metric for six sigma projects is the direct output characteristics of a process. It is something Six Sigma practitioners directly influence and it is used to measure project success. Like Highlander, “there is only one” and defect...

Precision

Precision refers to the agreement between the measured quantities obtained from replicating measurements of the same or similar objects in specified conditions. Precision is not a quantity, so it cannot be expressed numerically. It is instead expressed using...

Process Performance Index – Ppk

Process performance index, is a statistical tool to verify if the sample that have generated from the process is capable to meet the customer requirement. It measures the performance of the process related to both dispersion and centeredness. In simple words, Ppk is...

Power Analysis

Statistical power analysis stands as one of the most crucial yet often overlooked aspects of research design. Whether you’re conducting clinical trials, psychological experiments, or market research studies, understanding power analysis can make the difference...

Population Variance

Population variance is the average of the squared deviation of each individual data point from the population mean for all values of an entire group. The simplest estimators for population mean and population variance are simply the mean and variance of the sample,...
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