BSOP 429 WEEK 8
Week 8
Final Exam 1
Final Exam 2
1. The two different approaches to load work centers in job-shop scheduling are
load charts and schedule charts.
Gantt charts and assignment method.
infinite loading and finite loading.
linear programming and makespan.
None of the above
2. The priority rule where jobs are processed according to the smallest ratio of due date to processing time is
CR.
EEDD.
FCFS.
S/O.
SPT.
3. A scheduling rule used for sequencing jobs through two work centers is
the critical ratio rule.
the Johnson’s rule.
the slack per operation rule.
the shortest processing time rule.
the Pareto rule.
4. The owner and operator of the local franchise of Handyman, Inc., has four jobs to do today, shown in the order they were received:
Job Processing Time (hrs) Due (hrs from now)
————————————————————————————————-
W 4 4
X 3 5
Y 2 2
Z 1 1
If he uses the first-come, first-served (FCFS) priority rule to schedule these jobs, what will be the average completion time?
7.5 hours
5 hours
3 hours
2.5 hours
2 hours
5. The ultimate goal of JIT operations is to have
no in-process inventories.
cross-trained workers capable of handling every process.
a smooth, rapid flow of materials through the system.
no setup times.
All of the above
6. Building up an inventory of standard parts or modules instead of immediately producing the finished end items is the essence of
delayed differentiation.
kanban.
autonomation.
andon.
matrix management.
7. A kanban card is used to signal that (Points : 5)
work is needed at the work center.
work is ready to be moved to the next station.
a worker has run out of parts needed for further processing.
a machine has broken down and needs immediate attention.
a machine is ready for preventive maintenance.
8. The type of processing system that is used for highly standardized products is
continuous.
intermittent.
project.
batch.
unit.
1. The priority rule, which will sequence jobs in the order they are received, is _____.
EDD
LIFO
SPT
CR
FCFS
2. In an assignment method problem, if it takes Abe 3 hours to build a birdhouse and 4 hours for a doghouse, and Betty takes 4 hours for a birdhouse and 3 hours for a doghouse, what is the reduced cost (in hours) of assigning Betty to build the doghouse?
0 hours
1 hour
2 hours
3 hours
4 hours
3. A major difference between manufacturing and service systems in terms of scheduling is
variability in arrival and service rates.
processing cost per unit.
the number of units to be processed.
length of processing time.
output rate.
4. Scheduling in service systems may involve scheduling which of the following?
The workforce
The equipment
A and B
Customers
All of the above
5. The owner and operator of the local franchise of Handyman, Inc., has four jobs to do today, shown in the order they were received:
Job Processing Time (hrs) Due (hrs from now)
————————————————————————————————-
W 4 4
X 3 5
Y 2 2
Z 1 1
If he uses the earliest due date first (EDD) priority rule to schedule these jobs, what will be the average job tardiness?
0 hours
1.5 hours
1.75 hours
2 hours
2.25 hours
6. Building up an inventory of standard parts or modules instead of immediately producing the finished end items is the essence of (Points : 5)
delayed differentiation.
kanban.
autonomation.
andon.
matrix management.
7. With regard to suppliers, JIT systems typically require
delivery of large lots at regular intervals.
buyer inspection of goods and materials.
multiple sources from which to purchase.
long-term relationships and commitments.
the lowest price possible.
8. Which of the following is characteristic of the JIT philosophy?
Inventories are an asset.
Lot sizes are optimized by formula.
Vendors are co-workers, essentially other departments of our organization.
Queues are a necessary investment.
All of the above
9. In make-to-stock systems, fluctuations in sales volume are managed through which of the following?
Order backlog
Finished goods inventory
WIP or FG inventory
All of the above
None of the above
10. In an MRP master schedule, the planning horizon is often separated into a series of times periods called
pegging.
lead times.
stacked lead times.
time buckets.
firm, fixed, and frozen.
1.Does cellular manufacturing apply best to repetitive, high-volume product or nonrepetitive, low-volume product? Explain and give an example.
2. Validate or invalidate the statement that although inventories are maintained, the goal of lean operations is to maintain a minimum of safety stock.
3. Elaborate on the statement: “The output of the system cannot exceed the output of the bottleneck operation(s).”
4. Differentiate between infinite loading and finite loading as two major approaches used to load work centers.
5. Explain why batch process helps maximize worker efficiency.
6. Refer to the following data for jobs waiting to be processed at a single work center (jobs are shown in order of arrival):
Job Processing Time (days) Due Date (days from now)
——————————————————————————————————
A 2 2
B 5 6
C 6 10
D 3 4
E 4 8
What is the schedule sequence using the first-come, first-served (FCFS) priority rule?
7. Respond to the question: “Which is better, MRP or JIT?”
8. The design of the MPC system is influenced by some key features of market demand and product design. Name the key features that will lead to a make-to-stock system and explain the rationale.
9. Market requirements drive the choice of the shop floor system approach. Describe and explain the type of market requirements that would be suitable for an MRP-based system, along the lines of product design, product variety, and product volume per period, product mix changes, and delivery schedule changes.
10. Manufacturing strategy also drives the choice of shop floor system. Describe and explain the strategies that lend themselves to a JIT-based system, from the perspective of WIP, changeover cost, and process choice.
1. Explain how cellular manufacturing represents a flexible manufacturing system.
2. State the four building blocks of lean operations, and explain how fast and simple are the two common threads that run through them.
3. Elaborate on the statement: “The output of the system cannot exceed the output of the bottleneck operation(s).
4. Differentiate between infinite loading and finite loading as two major approaches used to load work centers.
5. The theory of constraints has a goal of maximizing flow through the entire system.
6. Refer to the following data for jobs waiting to be processed at a single work center (jobs are shown in order of arrival):
Job Processing Time (days) Due Date (days from now)
——————————————————————————————————
A 2 2
B 5 6
C 6 10
D 3 4
E 4 8
What is the average completion time for the first-come, first-served (FCFS) priority rule schedule? Average job tardiness? Average number of jobs at the center?
7. Respond to the question: “Which is better, MRP or JIT?
8. The design of the MPC system is influenced by some key features of market demand and product design. Name the key features that will lead to an assemble-to-order system and explain the rationale.
9. Market requirements drive the choice of the shop floor system approach. Describe and explain the type of market requirements that would be suitable for an MRP-based system, along the lines of product design, product variety, product volume per period, product mix changes, and delivery schedule changes.
10. Manufacturing strategy also drives the choice of shop floor system. Describe and explain the strategies that lend themselves to a JIT-based system, from the perspective of WIP, changeover cost, and process choice.
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