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Unit 11: Material Requirements Planning Q1. Short Answers 1. What do we mean when we say that MRP is based on dependent demand? 2. What are the sources of demand in an MRP system? Are these dependent or independent, and how are they used as inputs to the system? 3. Should safety stock be necessary in an MRP system with dependent demand? If so, why? If not, why do firms carry it anyway? Q2. In the following MRP planning schedule for Item J, indicate the correct net requirements, planned order receipts, and planned order releases to meet the gross requirements. Lead time is one week. WEEK NUMBER ITEM 0 1 2 3 4 5 75 50 70 40 Gross requirements On hand Net requirements Planned order receipt Planned order release Q3. Choose the answer for each question Questions Answer 1. MRP is based on what type of demand? 2. Which scheduling process drives requirements in the MRP process? 3. What term is used to identify the difference between the number of units of an item listed on the master schedule and firm customer orders? 4. What are the three primary data sources used by the MRP system? 5. What is another common name for the bill-of-materials? 6. What is the process to ensure that all of the needs for a particular item are calculated at the same time in the MRP process? 7. What is the MRP term for the time periods used in planning? a. Master production scheduling b. Master production schedule, bill-of-materials, inventory records file Low-level coding d. Product structure tree -or- product tree e. Dependent demand f. Time buckets g. Available to promise