HieraStates: Supporting Workflows which Include Schematic and Ad-hoc Aspects
نویسنده
چکیده
The mixture of production and ad-hoc aspects in organizational work is a ubiquitous phenomenon which potentially occurs on all levels of detail in a workflow. In this paper I first describe how this problem is addressed in the Object-oriented Activity Support Model. The model supports the manual modifications of the subactivity tree in collaboration with a workflow engine, and it supports the mixture of activities with and without an execution scheme. Then I describe in more detail how the HieraStates mechanism for specifying and running execution schemes supports schemes which allow several degrees of flexibility during execution of an activity. These schemes provide support for activities where the ad-hoc and production aspects cannot be easily separated into different substeps. Throughout the paper the example of a purchase order is used to illustrate
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