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...Hierarchical integration of production planning and scheduling by arnoldo c hax harlan meal may i x ii abstract this paper describes the development a system for multiple plant product seasonal demand situation in structure optimal decisions at an aggregate level provide constraints detailed decision making four levels are used first products assigned to plants using mixed integer programming long term capacity provision utilization second stock accumulation plan is prepared linear allocations each among types within which have similar inventory costs third schedules family standard control methods items grouped since share major setup allocating type families fourth individual run quantities calculated item again approximations procedures developed described sufficient detail guide application we also discuss problems encountered implementation approach resolve these finally estimate benefits introduction objective present framework results order illustrate with specific examples desi...