Task management(TM) is the automation of a business process for supporting multimedia content in whole or part. To achieve the function of TM, the multimedia business process must be abstracted from the real world and described by a kind of formal method. The result is process model. This paper presents a novel approach, called PGM, for modeling and implementing the process model using a process-guide model(PGM). The PGM constitutes a self-contained piece of multimedia content that indivisibly unites three of the content's aspects, namely the media aspect, the semantic aspect, and the functional aspect. The model provides means for the integration of ontological knowledge within a PGM. A formal definition is proposed for PGM.