Task Variance refers to the difference between actual and expected performance of a task. It is a measure that shows how task performance is changed throughout a certain period of time. The measure of task variance serves as a convenient way of performance control through identifying changes happened with a task.
Task variance can be identified and measured by carrying out variance analysis. Such an analysis aims to compute the difference between reached and targeted levels of task performance and to identify variance causes. The analysis is of fundamental importance to effective task management because it helps determine performance variation threshold which triggers a remedial action or warning.
There are several common factors that may cause variation (decrease) of task performance:
- Changes in HR structure. Example: employee dismissal, insufficient competencies, lack of training.
- Changes in management structure: lack of supervision, poor leadership, unmotivated employees.
- Changes in finance structure: irrelevant cost allocation, lack of finance control, larceny.