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Business Process Management by Martyn A. Ould

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REPRESENTING CONCURRENT THREADS OF ACTIVITY

There might be a point at which a role can start a number of separate threads of activity that can be carried out concurrently. ‘Now that I have written all the chapters I can prepare the contents list and at the same time I can prepare the index.’ This ‘splitting’ of a thread into two or more concurrent threads is represented in a RAD by the symbol shown in Figure 2.1 for part refinement. Strictly speaking, a state of the role is being refined (divided) into a number of separate parts. Another example of part refinement is the early split in the Designer role in Figure 2.2 where a designer starts two concurrent threads of activity. On one thread they choose a method; on the other they first prepare ...

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