In the paper a new approach to planning and scheduling of iterative processes is considered. Such kind processes occur typically in engineering design and - more generally - in the development new products. They should be avoided because they are costly and time consuming. Because traditional network methods of planning are not capable to deal with iterations then a new, matrix-based, method has been developed, especially designed for optimization of processes with feedbacks. Two different versions of the method are presented and applied to a given product realization process. After rearrangement of the process partial tasks order each version yielded different process structure. In both cases the original process has been significantly improved.
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