Assignable Cause

An assignable cause is a type of variation in which a specific activity or event can be linked to inconsistency in a system. In effect, it is a special cause that has been identified. As a refresher, common cause variation is the natural fluctuation within a system. It comes from Read more…

Reproducibility

Reproducibility is the ability of a process to be duplicated by multiple people. This concept is understood and highly valued in both the scientific method and when creating measurement systems. In fact, in gauge R&R, one of the “R’s” stands for reproducibility (the other is repeatability). We recognize that a Read more…

Reliability

Reliability is the ability of a process, machine, or measurement system to perform as intended over time. There is an underlying assumption that at one point, the ability to provide good results existed. The most common cause of a drop in reliability is the degradation of equipment. As machines wear Read more…

Product Family

For the purposes of continuous improvement, a product family is a group of products that follows a similar series of process steps. The value in this type of organization is that it supports flow. Similar products can be combined onto a mixed model production line. Generally speaking, the higher the Read more…