MANAGEMENT
Topic-15 MRP.ppt

Shift partial load of period 1 to period 2 2 shift

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Shift partial load of Period-1 to Period -2 2. Shift partial load of Period-3 to Period -2 and Period-4 3. Shift partial load of Period-6 to Period -7 4. Change maintenance schedule from Period -3 and Period-7. 5. 85 70 75 70 81 95 55 35 20 0 -5 10 -15 10 0 -15 25 45 60
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Capacity Requirements Capacity Requirements Explanation: Projected capacity requirements exceed weekly hours of capacity. Date: Week: 32 Plant 01 Dept. 03: Lathe Station Capacity: 320 hours per week Week 32 33 34 35 36 37 Planned hours 90 156 349 210 360 280 Actual hours 210 104 41 0 0 0 Total hours 300 260 390 210 360 280 Figure 16.13 Figure 16.13
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Ways to Resolve Capacity Imbalances There are to major ways to resolve capacity imbalances. Modify capacity by 1.planning to use overtime 2.rescheduling maintenance /training /vacations/….. 3.hiring temporary /part-time workers 4.shift workers among different work centers Modify workload by: 1. selecting alternative job routings. 2. increasing subcontracting amounts 3. modifying or revising the original MPS or MRP.
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Work Center Loading Methods Infinite vs. finite: 1. Infinite loading- not considering capacity constraint, leaving overload/underload problems to be corrected later. 2. Finite loading—capacity constraint is considered. Forward vs. backward: 1. Forward loading-loading from planned order release date. 2. Backward loading— loading from planned order receipt date.
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Infinite versus Finite Loading Infinite Loading Finite Loading Open Shop Orders Planned Orders
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Forward versus Backward Scheduling
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Work Center Loading Methods (II) Trade-off: - Forward with infinite loading: simple but more capacity imbalance problems. -- Backward with finite loading: complex but reduce capacity imbalance problems.
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Written Assignment- is due ……
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  • Summer '18
  • Jonh
  • Management, Manufacturing resource planning, planned order

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