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Published byBlaise Conley Modified over 9 years ago
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Workflow Management introduktion: Wil van der Aalst has copyrights to the slides conserning his book about Workflow Management. However, some of the slides are modified for the CBS course.
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The basic idea of workflow management:
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Business Process Reengineering (BPR):
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BPR (Business Process Reingenering) versus CPI (Continuous Process Improvement):
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A trend towards Work Flow Management Systems: Do You agree in the introduction periods of the figure?
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Trends i WFMS Normally ETL (extract, transform and load) and ERP (Enterprice ressource planning) systems has their own WFMS. However, there is no WFMS standard!
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Architecture of a WFMS: A workflow management system (WFMS) is a software package that can support the design, magement and execution of workflow processes.
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Terminology of WorkFlow Management Coalition Task = Atomic logic activity in a process. Process = A set of tasks and a set of conditions that determine the order of the tasks. Case = Transaction in a process.
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A WFMS can manage processes with many pivot subtransactions i.e. points of no return! Does a WFMS have the Atomicity property? Is it possible to use countermeasures against isolation anomalies?
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Petri net terminology: Transition = Task. Token = Case illustrated as a black dot in a place. Place = Queue for cases/transactions before a transition(s).
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The classical Petri net model:
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Properties of Petri nets: Enables processes to be described graphically. Can describe process patterns in e.g. ERP and e-commerce systems. Analyzing tool for e.g. performance improvement. Tool for verifying logical properties. Tool for integrating different systems
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Loaded/enabled transitions can fire: A firing (execution of a task using a token) changes the state.
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Car production process:
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Traffic light example:
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Traffic light at a road intersection : What is wrong in the trafic light model above?
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A model of two synchronized traffic lights:
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End of session Thank you !!!
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