Difference between a gross requirements plan and a net requirements plan

1. What is the difference between a gross requirements plan and a net requirements plan?
2. Once a material requirements plan (MRP) has been estab-lished, what other managerial applications might be found for the technique?
3. What are the similarities between MRP and DRP?
4. Which is the best lot-sizing policy for manufacturing organi-zations?
5. Master schedules are expressed in three different ways depending on whether the process is continuous, a job shop, or repetitive. What are these three ways?
6. What is the rationale for (a) a phantom bill of material, (b) a planning bill of material, and (c) a pseudo bill of material?
7. What are the distinctions between MRP, DRP, and ERP?

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