MGO 302 Lecture Notes - Lecture 6: Master Production Schedule, Inventory Control, Makespan

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Question 1
1.
An operation consists of two steps, the first of which has a reliability of 90%, and the
second a reliability of 85%. What is the probability that the operation will fail?
55.0%
14.5%
23.5%
76.5%
85.5%
An operation consists of two steps, the first of which has a reliability of 90%, and the second a
reliability of 95%. What is the probability that the operation will fail?
14.5%
23.5%
55.0%
76.5%
85.5%
Question 2
1.
The XYZ Company has just hired you as Production Manager of their North American
Fabrication Facility. Your first job is to use the MRP methodology to schedule
production for the next nine weeks. The XYZ Company has given you the following
information to work with:
Bill of Materials and Current Inventory Records:
Item Parent Leadtime (in
weeks)
Lotsize Inventory
Currently On-
hand
A none 1 Lot-for-Lot 0
B A 2 Lot-for-Lot 0
C A 3 100 52
Master Production Schedule:
Item Week
1
Week
2
Week
3
Week
4
Week
5
Week
6
Week
7
Week
8
Week
9
A 0 0 0 15 0 60 0 36 75
You may assume one-to-one parent/child requirements when assembling this particular
product structure. Which of the following are true statements about Week 3 of your
plan?
I. An order of 15 of Item B will be received.
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II. An order for 60 of Item B will be placed (planned order release).
III. There will be 66 of Item C in inventory at the end of Week 3.
I, II and III
II only
I and III
I only
I and II
You may assume one-to-one parent/child requirements when assembling this particular product
structure. Which of the following are true statements about Week 5 of your plan?
I. An order of 60 of Item B will be received.
II. An order for 100 of Item C will be placed (planned order release).
III. There will be 77 of Item C in inventory at the end of Week 5.
I only X
I and III X
II only
I and II X
I, II and III
Question 3
1.
In the lean operations philosophy, the ideal lot size is:
the capacity of the standard container
N=(DT(1+X))/C
the economic order quantity
the economic run size
one unit
1 points
Question 4
1.
Which of the following is a (are) potential disadvantage(s) of lean operation?
I. The system requires fairly level production schedules.
II. Quality problems can “hide” in the increased levels of work-in-process inventory that
will be produced by this system.
III. A system emphasizing the principles of lean operation often requires more explicit
managerial planning and control than a typical MRP system.
I only
I and II
I, II, and III
III only
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II only
1 points
Question 5
1.
Jack, the owner of Jack's Electronic Repair, currently has five jobs that need to be
scheduled:
PROCESSING DUE
JOB TIME (hours) (hours)
=== ============ =======
A 3 5
B 1 1
C 4 9
D 2 3
E 5 7
If Jack uses the shortest processing time first (SPT) priority rule to schedule these jobs,
what will be the average job tardiness?
2.2 hours X
2.33 hours X
2.4 hours
2 hours
3 hours
Which of the following statements is (are) true?
I. Line balancing is a major factor in the design and scheduling of low volume systems.
II. Makespan is the total time needed to complete a group of jobs.
III. A major disadvantage of the SPT (Shortest Processing Time) rule is that it tends to make
very short jobs wait for a long time.
I, II, and III X
I only
II and III X
I and III X
II only
Question 6
1.
You are working on a group project report with five other students. Alvin, a member of
your group, has brought a finished project report to the meeting, which he obtained from
a friend who completed the same project last semester. Everyone scans the old finished
report with interest, and Alvin suggests that your group could use some of the material in
the old finished report, particularly the graphs. You ask if anyone thinks this might be
unethical, and is it possible that the professor might somehow notice the use of an old
report in the preparation of this semester' s report? Other members of your group look
troubled by your questions, but Alvin gets angry. He accuses you of thinking he is a
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Document Summary

An operation consists of two steps, the first of which has a reliability of 90%, and the second a reliability of 85%. An operation consists of two steps, the first of which has a reliability of 90%, and the second a reliability of 95%. The xyz company has just hired you as production manager of their north american. Your first job is to use the mrp methodology to schedule production for the next nine weeks. The xyz company has given you the following information to work with: Which of the following are true statements about week 3 of your plan: an order of 15 of item b will be received. An order for 60 of item b will be placed (planned order release). There will be 66 of item c in inventory at the end of week 3. You may assume one-to-one parent/child requirements when assembling this particular product structure.

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