Opesm 330

1. What is the ultimate goal of a lean system? What are the supporting goals? What are the building blocks?

2. Describe the philosophy that underlies JIT (i.e., what is JIT intended to accomplish?).

3. What are some of the main obstacles that must be overcome in converting from a traditional system to lean?

4. Briefly discuss vendor relations in lean systems in terms of the following issues:

* a. Why are they important?

* b. How do they tend to differ from the more adversarial relations of the past?

* c. Why might suppliers be hesitant about JIT purchasing?

5. Contrast push and pull methods of moving goods and materials through production systems.

6. Why is scheduling fairly simple for repetitive systems but fairly complex for job shops?

* 7. Briefly describe each of these priority rules:

* a. FCFS

* b. SPT

* c. EDD

* d. S/O

* e. Rush

* 8. What problems not generally found in manufacturing systems do service systems present in terms of scheduling the use of resources?

* 9. Explain forward and backward schedulings and each one’s advantage

1. (TCO 10) For a company with a product mix of 40% of Product A and 30% each of Products B and C, which of the following mixed-model sequences most reflects the lean philosophy? (Points : 5) |

       AABBCCAABC

       ABCABCABCA

       AAAABBBCCC

       BCABCABCAB

       BBBAACCCAA

|

2. (TCO 10) Which of the following is not a benefit of small lot sizes in lean systems? (Points : 5) |

       In-process inventory is considerably less.

       Each product is produced less frequently.

       Carrying costs are reduced.

       There is less clutter in the workplace.

       Inspection and rework costs are less.

|

3. (TCO 10) Which of the following is not characteristic of preventive maintenance in lean systems? (Points : 5) |

       Maintaining equipment in good operating condition

       Replacing parts when they are...