Fuzzy control charts represent a significant evolution in Statistical Process Control (SPC) by addressing intrinsic uncertainties in measurement and human evaluation that classical approaches often ...

Random variation is a deviation from a standard distribution independent of inputs or biases. Randomness directly correlates ...

Control charts have two general uses in an improvement project. Undeniably, the most common application is as a tool to ...

All Shewhart charts have the following characteristics: Each point represents a summary statistic computed from a sample of measurements of a quality characteristic. For example, the summary statistic ...

Statistical process control (SPC) involves ongoing checks to ensure that neither the mean nor the variability of the process readings has changed. Conventionally, this is done by pairs of ...

As the volume and variety of available data continue to proliferate, organizations increasingly turn to analytics in order to enhance business decision-making and ultimately, performance. However, the ...

The extent to which products meet specifications needs to be systematically monitored in a production process. Product quality will typically be defined by two quantities: deviations from stated ...

When we say the bottom dropped out of the S&P 500 last week, what does that mean? The stock market has weeks when its value rises and has weeks when its value falls from the previous week, but we ...