Kwanhee Han

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Performance analysis is a critical component of workflow system management. Workflow models represented in Petri net have advantages of abundant analysis techniques available. Reachability analysis is useful to detect errorneous states of the business logic, however, it has the problem of state explosion. In this paper, we propose the method of hierarchical(More)
Equipment maintenance is one of the essential tasks for manufacturing industries. There have been a number of information systems developed to cope with equipment malfunctions. Most fault diagnosis systems are applications of expert systems which have two drawbacks with regard to knowledge acquisition. One is the lack of knowledge continuity; the other is(More)
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