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By Prof. Dr. Klaus Neumann, Dr. Ulrich Steinhardt (auth.)

Towards the tip of the fifties tools for making plans, scheduling,and keep watch over of proj­ ects have been built at the foundation that the evolution of a undertaking will be linked to a unique weighted directed graph, referred to as task community. during this organization, the person actions of the venture correspond to the arcs, the so-called proj­ ect occasions (beginning or termination of actions) correspond to the nodes, and the periods of the actions correspond to the weights of the respective arcs of the directed graph. 1) Contiguous arcs are assigned to actions which be triumphant each other instantly. the development similar to a node happens precisely on the time at which all actions that are linked to the arcs major into the node are terminated. After the incidence of an occasion all these actions are be­ gun which correspond to the arcs emanating from the respective node. this suggests specifically that the evolution of the undertaking should be uniquely decided ahead of­ hand, that each job and each occasion are learned precisely as soon as throughout the exe­ cution of the undertaking, and that "feedback" (corresponding to cycles within the asso­ ciated community) isn't really approved. Many tasks, for instance such a lot R&D tasks and tasks within the zone of creation p 1 anni ng, don't sa ti sfy the foregoi ng res tri cti ons.

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