Variation that can be clearly identified and possibly managed.

Unnatural variation in a system is referred to as assignable variability. It must be recognized as well as dealt with. Control charts allow us to identify the kind of variance in a procedure. Supervisors that consider every variance as if it were related to assignable reasons are a common concern in an organization.

This fluctuation can be produced by a variety of variables, certain of which one can influence as well as others that are essential in the procedure. Assignable variation is variability produced by variables that can be properly defined as well as potentially even controlled. Assignable variation, for instance, is the variance caused by individuals not being similarly qualified or by incorrect equipment modification.

A non-random distribution of outcomes driven by a particular identified variable with well-defined features. A situation like this is easily managed. This is also referred to as a particular cause as well as unusual variation in statistical procedure controls.