Task Model refers to a logical description of smaller measurable and observable activities or tasks that are critical to the performance of a larger specific job. It aims to create a detailed hierarchical representation of work for analyzing and evaluating possible ways for doing this work. Task model is a tool of task decomposition.
Task models are mostly used to workflow-based environments in which any job or element of work can be presented as a logical series of interrelated activities which are prioritized, sequenced and aligned with the same high-level objectives. A typical model of tasks helps:
- Reach a better understanding of work by eliminating unnecessary components
- Improve decision making by simulating "what if" scenarios
- Explain, control and forecast events on the basis of past observations
As a tool for decomposing work into tasks and simple operations, task model outlines relationships between tasks and sub-tasks and creates a task flow diagram. Modelling helps develop several scenarios or models of task decomposition. Then through task analysis it is possible to select one of the scenarios that best fits into a particular job.