Process Hierarchy is a decomposition technique for classifying a process into identifiable and interdependent elements in order to create a pyramid-like ranking of these elements. This technique lets create a multi-level design of the process in which every level has one higher and one lower neighbor.
There are two groups of links between elements in a process hierarchy design:
- Direct and indirect
- Vertical and horizontal
Besides, the linking mechanism determines dependencies between process elements. Dependencies identify either fixed (permanent) or changing (dynamic) interrelationships between the elements.
Process hierarchy is the framework of process planning. By classifying a process into smaller, more manageable steps, it is possible to create an activity-based plan that determines how to perform the process and complete its objectives. In such a plan every activity is linked to neighbor activities, ranked and sequenced. All the activities are leveled and organized hierarchically, so that the process plan consists of stages that symbolize implementation state at any given point in time.
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