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 ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

A control chart begins with a time series graph. A central line (X) is added as a visual reference for detecting shifts or trends – this is also referred to as the process location. Upper and lower ...

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 ...

Multiple inventory control methods exist including aggregate control, item level control, ABC analysis, economic-order-quantity and lot-size methods. Small companies that find it difficult to ...

Good building mechanical design requires a firm grasp of the mechanical engineering fundamentals (thermodynamics, psychrometrics, the fan laws, etc.). The same can be said about the BAS design needed ...