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Process Shift is a variation measure that shows an abrupt upward or downward change in the performance of a process which appears to be stable and consistent. This measure identifies the process’s ability to increase or decline its performance suddenly and to keep this performance level permanently or over a relatively long period.
The term is often used in statistical analysis for investigating various data and determining performance picks and falls. On a graph, process shift can be visually represented as a parabolic curve. Analysts can use process performance charts to track performance increases and declines.
For instance, an auditor working for a trading company uses a sales performance chart to draw the performance line of the selling process; in case some sudden change happens to the process (e.g. an innovative sales technique is implemented in the process), the auditor measures the impact and draws a parabolic curve on the chart. If the change causes a permanent or relatively long performance variation, then this curve signifies the process’s shift. The upper and the bottom spots on the curve will show performance peak and fall respectively.
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