Question 1

In the sequence of decisions that affect scheduling,________ is (are)the immediate follower(s)of the master schedule (or master production schedule).

Accepted Answer

short-term schedules

Question 2

________ uses computerized short-term scheduling to overcome the disadvantages of rule-based systems by providing the user with interactive computing and graphical output.

Accepted Answer

Finite capacity scheduling

Question 3

Given the following chart of jobs assigned with Johnson's rule,suppose that all the jobs (A,B,C,etc)could be evenly divided into two tasks (such as A1 and A2,B1 and B2,etc).Suppose job B is divided into jobs B1 and B2,each with a body work time of 4.5 hours and a paint time of 2 hours.How much is makespan reduced by this splitting of B?

Accepted Answer

B1 could start on paint at time = 34.5 (1/2 through the completion of B)but E is busy on paint until t = 35,thus B1 will be delayed until t = 35 to start and thus would finish paint at time = 37.B2 could start on paint at time = 39 and would take until t = 41 to finish.Thus makespan is reduced by 2 hours (43 - 41).

Question 4

An approach to sequencing that can handle the situation where jobs must pass through two or more work centers in a fixed sequence is ________.

Accepted Answer

The answer of An approach to sequencing that can handle...

Question 5

________ cards are used to control the amount of work in a work center,aiding input-output control.

Accepted Answer

ConWIP or

Question 6

What are four main criteria by which we evaluate sequencing rules?

Accepted Answer

There are a number of criteria for evalu

Question 7

The jobs listed below need to be completed.Assume that it is now day 140.If the jobs are sequenced according to the longest processing time rule,what is the lateness of job A?

Accepted Answer

A) 0.0 days 
B) 24.0 days 
C) 7.4 days 
D) 9.0 days 
E) 11.6 days 
A) 0.0 days 
B) 24.0 days 
C) 7.4 days 
D) 9.0 days 
E) 11.6 days

Question 8

There are two jobs to be assigned to two workers.The profit for worker A on job 1 is $5 and on job 2 is $8.The profit for worker B on job 1 is $10 and on job 2 is $12.How should the work be divided using the assignment method?

Accepted Answer

A) worker A assigned to job 1 and worker B assigned to job 2 
B) worker A assigned to job 2 and worker B assigned to job 1 
C) worker A gets both jobs 1 and 2 
D) worker B gets both jobs 1 and 2 
E) unable to determine 
A) worker A assigned to job 1 and worker B assigned to job 2 
B) worker A assigned to job 2 and worker B assigned to job 1 
C) worker A gets both jobs 1 and 2 
D) worker B gets both jobs 1 and 2 
E) unable to determine

Question 9

What is the objective of scheduling?

Accepted Answer

A) maximize quality 
B) minimize cost 
C) minimize response time 
D) prioritize and allocate demand to available facilities 
E) minimize lead time 
A) maximize quality 
B) minimize cost 
C) minimize response time 
D) prioritize and allocate demand to available facilities 
E) minimize lead time

Question 10

Which of the following is a limitation of rules-based dispatching systems?

Accepted Answer

A) Rules need to be revised to adjust to changes in orders,product mix,and so forth. 
B) Rules may not recognize idle resources. 
C) Rules may not recognize bottleneck resources 
D) Rules may not be able to prioritize two jobs with identical due dates. 
E) All of the above are limitations. 
A) Rules need to be revised to adjust to changes in orders,product mix,and so forth. 
B) Rules may not recognize idle resources. 
C) Rules may not recognize bottleneck resources 
D) Rules may not be able to prioritize two jobs with identical due dates. 
E) All of the above are limitations.

Question 11

Which critical ratio value implies that a job is already late?

Accepted Answer

A) more than 100 
B) 1 
C) less than 1 
D) 10 
E) 3.4 
A) more than 100 
B) 1 
C) less than 1 
D) 10 
E) 3.4

Question 12

Five jobs are waiting for processing through two work centers.Their processing time (in minutes)at each work center is contained in the table below.Each job requires work center Alpha before work center Beta.According to Johnson's rule,what is the optimum sequence of jobs and the minimum time for completion of all jobs?

Accepted Answer

A) V-T-S-U-R;225 
B) U-R-T-S-V;175 
C) R-S-T-U-V;240 
D) U-S-V-T-R;200 
E) R-U-T-S-V;175 
A) V-T-S-U-R;225 
B) U-R-T-S-V;175 
C) R-S-T-U-V;240 
D) U-S-V-T-R;200 
E) R-U-T-S-V;175

Question 13

________ determine the sequence of jobs in process-oriented facilities.

Accepted Answer

The answer of ________ determine the sequence of jobs in...

Question 14

Gantt charts are useful for scheduling jobs,but not for loading them.

Accepted Answer

A) True 
 B)False

Question 15

Machines A,B,C,and D have been in use for several years,while machine E is new.The following table provides data on the value of production of each job when performed on a specific machine.
(a)Determine the set of assignments that maximizes production value.
(b)What is the total production value of your assignments?
(c)Which machine should be retired (i.e. ,gets no assignment)?

Accepted Answer

NOTE: students need to create an opportu

Question 16

What is the assignment method?

Accepted Answer

The assignment method is a spe

Question 17

What is a method of input-output control that uses a system of cards to limit the amount of work at a work center and also to control lead time and monitor backlog?

Accepted Answer

A) the assignment method 
B) backward scheduling 
C) forward scheduling 
D) ConWIP cards 
E) level material use 
A) the assignment method 
B) backward scheduling 
C) forward scheduling 
D) ConWIP cards 
E) level material use

Question 18

Bob Dresser operates a major appliance warranty service center.His operation has two check stations that are required at the end of every repair task performed by his appliance repair staff.These are the Functionality Review (FR)and the Overall Scan (OS).The FR must be performed successfully before the OS is begun.On Friday morning,six repair jobs are completed,awaiting these two inspection activities.Processing times are given in minutes.
   a.What is the optimal sequence of jobs for the objective of minimizing the total flow time?
b.Show your work,and document the sequence.
c.Chart the solution to this problem.
d.What jobs are being processed at time period 90?
e.What is the total flow time of this problem?

Accepted Answer

(a)The optimal sequence is F-D-B-A-C-E.

Question 19

Johnson's rule sequences a set of jobs through two different machines or work centers in the same order.

Accepted Answer

A) True 
 B)False

Question 20

Given the following chart of jobs assigned with Johnson's rule,suppose that all the jobs (A,B,C,etc)could be evenly divided into two tasks (such as A1 and A2,B1 and B2,etc).Suppose job D is split into two equivalently sized sections,D1 and D2,each with a body work time of 1.5 hours and a paint time of 2 hours (D1 and D2 sum to 3 hours of body work and 4 hours of paint which is equivalent to D).How much is makespan reduced by this splitting of D?

Accepted Answer

Job D1 could now start paint at t = 1.5

Exam 15: Short-Term Scheduling

In the sequence of decisions that affect scheduling,________ is (are)the immediate follower(s)of the master schedule (or master production schedule).

________ uses computerized short-term scheduling to overcome the disadvantages of rule-based systems by providing the user with interactive computing and graphical output.

An approach to sequencing that can handle the situation where jobs must pass through two or more work centers in a fixed sequence is ________.

________ cards are used to control the amount of work in a work center,aiding input-output control.

What are four main criteria by which we evaluate sequencing rules?

The jobs listed below need to be completed.Assume that it is now day 140.If the jobs are sequenced according to the longest processing time rule,what is the lateness of job A?

There are two jobs to be assigned to two workers.The profit for worker A on job 1 is $5 and on job 2 is $8.The profit for worker B on job 1 is $10 and on job 2 is $12.How should the work be divided using the assignment method?

What is the objective of scheduling?

Which of the following is a limitation of rules-based dispatching systems?

Which critical ratio value implies that a job is already late?

________ determine the sequence of jobs in process-oriented facilities.

Gantt charts are useful for scheduling jobs,but not for loading them.

What is the assignment method?

What is a method of input-output control that uses a system of cards to limit the amount of work at a work center and also to control lead time and monitor backlog?

Johnson's rule sequences a set of jobs through two different machines or work centers in the same order.

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