Workflow technology has emerged as one of the leading technologies in modeling, redesigning, and executing business processes.\ud The management of temporal aspects in the definition of a workflow process has been considered only recently in the literature.\ud Currently available workflow management systems (WfMS) and research prototypes offer a very limited support for the definition, detection, and management of temporal constraints over business processes.\ud In this paper, we propose a new advanced workflow conceptual model for expressing time constraints in business processes and we present a general technique to check different levels of temporal consistency for workflow schemata at process design time: since a time constraint can be satisfied in different ways, we propose a classification of temporal workflows according to the way time constraints are satisfied.\ud Such classification can be used to successfully manage flexible workflows at run time

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The diffusion of clinical guidelines to describe the proper way to deal with patients? situations is spreading out and opens new issues in the context of modeling and managing (temporal) information about medical activities. Guidelines can be seen as processes describing the sequence of activities to be executed, and thus approaches proposed in the business context can be used to model them. In this paper, we propose a general conceptual workflow model, considering both activities and their temporal properties, and focus on the representation of clinical guidelines by the proposed model

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