OldTests_F08 - MGMT 46000 Spring 2008 Test 1 Old Tests Fall...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
OldTests_F08.doc Page 1 MGMT 46000 Old Tests – Fall 2008 Only problems from tests (no descriptive questions) given during last academic year are included. Spring 2008: Test 1 Question 2 [20 points: 3 + 2 + 4, 3 + 4 + 4] Part (A): Product X is produced using the process shown to the right. Processing times are in minutes . i. What is the capacity of the Stage 1 in units / hr? ii. What would be the productivity of the process, assuming one worker per machine? iii. If you can add machine M5 (of smallest capacity) in parallel either at stage 1 or stage 2, where would you add it and what will be the cycle time of this machine to maximize process capacity? Part (B): Another product (Y) is processed in 2 stages. At stage 1 there are two machines in parallel (M1 and M2); each requires 12 minutes for processing. At stage 2, there is one machine R1; it needs 6 minutes for processing. Consider the schedule represented in the Gantt chart below. M1 1 3 5 7 M2 2 4 6 R1 1 2 3 4 5 6 Time 10 20 30 40 50 Assume that the process becomes stable after the first two jobs. (i) What is the average throughput time for the schedule? Explain . (ii) Calculate the WIP contributions of M1, M2 and R1 and the total WIP and write them in the table shown. (iii) What is the actual cycle time ? Hint: you can use part (i) and part (ii) answers and Little’s formula. Question 3 [20 points Æ 6 + 9 + 5]: Task times are in seconds in the precedence diagram. Task times = 125 seconds. Target cycle time is 35 sec. / unit. Round off efficiency answers to one decimal place . Part (A): List the tasks in RPW order . Tiebreaker: larger task number has higher priority. Task 1 2 3 4 5 6 7 8 9 10 W e i g h t Resource WIP contribution M1 M2 R1 Total Tasks in RPW order 1 3 5 2 4 6 17 14 15 14 7 10 7 8 10 9 12 15 14 6 M1 6 M4 3 M2 8 M3 8 Stage 1 Stage 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
OldTests_F08.doc Page 2 Part (B): D o line balancing in the table below. Use the priority order given below ( not the RPW order from part A ). Part (C): Another layout for the above problem is shown here. Calculate effective cycle time and the line efficiency. Question 4 [20 points 8+2, 8+2]: Use as many rows as needed (add if required). Aggregate demand and capacity for a plant with four-quarter planning horizon is shown in the table. No shortages are permitted. Beginning inventory (at the end of Q 0 ) is 800. Part (A): 1. Obtain a production plan with “Chase Strategy”. Make separate adjustments for each quarter where the constraints are violated. 2. Explain adjustments here. Part (B): 1. Obtain a production plan with “Level Strategy” . 2. Explain adjustments here. Question 5 [20 points 6+4, 10]: The precedence diagram for a process is shown to the right (task times are in seconds). Assume 7.5 hours per operator per day (and a single shift). Part (A): The process flow diagram below represents the four stations of one assembly line. There is one operator per station. You can set up multiple lines in parallel.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 14

OldTests_F08 - MGMT 46000 Spring 2008 Test 1 Old Tests Fall...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online