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This paper describes an approach to the design of online help for programming tasks and modelling tasks, based on a theoretical framework of problem solving and learning. The framework leads to several design principles which are important to the problem of when and how to supply help information to a learner who is constructing a solution to a given(More)
Condition-event Petri nets are a means to model technical, social, and natural processes and organizations in order to unterstand their behavior, to identify bottlenecks and resource shortcomings, and to propose appropriate changes. PETRI-HELP is an intelligent problem solving environment that supports this modelling activity. Since there is no clear-cut(More)
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