Chapter 3 Building a Process Hierarchy Diagram
The Process Hierarchy Diagram (PHD) is one of the diagrams of the Business Area Analysis (BAA). The BAA is an Information Engineering methodology that allows the definition of requirements by identifying high-level business functions and information needs.
A process hierarchy diagram defines the static structure of the model, it contains a set of processes and decompositions (sub-processes). These objects together form a process hierarchy structure that is a decomposition of top-level business functions in a project.
A process hierarchy diagram helps you identify the atomic business tasks. It allows the review of the whole process and focuses on redundant or missing tasks.
A process is a coordinate set of activities or tasks that allows a business to function.
For more information about processes, see section Defining processes in an analysis BPM in chapter Building an Analysis Business Process Model.
The process hierarchy diagram is the first step that allows you to define control flows in a second time. Control flows can be designed as flow charts in the business process diagram as explained in section Creating a flow chart for a decomposed process.
The process hierarchy diagram is part of a Business Process Model. It is one of the available diagrams in a BPM. It shows the symbols of the objects defined in the decomposition of top-level business functions. The objects are the processes, sub-processes, and their decomposition (branches).
The process hierarchy diagram can be created in a model, a package, but not within a decomposed process.
For more information about diagrams of the BPM, see section What is a BPM?, in chapter Getting Started with the Business Process Model.
For more information about decomposed processes, see section Decomposed processes and sub-processes, in chapter Building an Analysis Business process model.
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