2 types of variation and how we distinguish between common and special cause variation, along with how to create a rational subgroup. We also cover the equations and constants for the X-bar and R ...

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

A control chart plots measured values along with upper and lower quality control limits. Values appearing outside these limits are unacceptable and could indicate a manufacturing problem. Although ...

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 ...

Statistical process control (SPC) charts provide a natural approach to analysing time series data for healthcare quality ...

Chart patterns are the foundation of technical analysis. Much of our understanding of chart patterns can be attributed to the work of Richard Schabacker, Edwards and Magee. The way volume, support and ...