
Concept explainers
(a)
Interpretation:
The time period required on an average to finish the job.
Concept Introduction:
(a)

Explanation of Solution
Given information:
The owner of an in HM Catering Company has four jobs to deliver today, shown in the order in which they are received:
Job | Processing Time (hrs) | Due (hrs) |
Schedule the jobs based on the first come first served:
Hours | ||||||||||
Job |
From the table, it is observed that the flow time of the job
The flow time of the job
The flow time of the job
In order of the job
The flow time of the job
In order of the job
Thus, calculate the average flow time that is required to finish the each job:
Now, calculating the average tardiness, adding the delay time of the order and divide it by the number of the orders;
(b)
Interpretation:
The job that will be late and the average job tardiness.
Concept Introduction:
Schedule the job on the basis of the
(b)

Explanation of Solution
Given information:
The owner of an in home meal catering company has four jobs to deliver today, shown in the order in which they are received:
Job | Processing Time (hrs) | Due (hrs) |
Schedule the jobs based on the
Hours | ||||||||||
Job |
From the table, it can be observed that
Thus, calculate the average flow time that is required to finish the each job:
Now, calculating the average tardiness, adding the delay time of the order and divide it by the number of the orders;
(c)
Interpretation:
The job that will be late and the average job tardiness.
Concept Introduction:
Schedule the job on the basis of the
(c)

Explanation of Solution
Given information:
The owner of an in home meal catering company has four jobs to deliver today, shown in the order in which they are received:
Job | Processing Time (hrs) | Due (hrs) |
Schedule the jobs based on the
Hours | ||||||||||
Job |
From the table, it can be observed that
Now, calculating the tardiness, adding the delay time of the order and divide it by the number of the orders;
Thus, calculate the average flow time that is required to finish the each job:
(d)
Interpretation:
The most efficient sequence from the
Concept Introduction:
The efficiency can be measured as the average tardiness or the number of jobs delayed and the average flow time.
(d)

Explanation of Solution
Given information:
The owner of an in home meal catering company has four jobs to deliver today, shown in the order in which they are received:
Job | Processing Time (hrs) | Due (hrs) |
The efficiency can be measured as the average tardiness or the number of jobs delayed and the average flow time.
Average flow time:
By comparing the average flow time, it is observed that
Average tardiness:
By comparing the average tardiness, it is observed that
Number of jobs delayed:
Both
Therefore, it depends on the owner which gives the priority to the most efficient method will vary.
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Chapter 14 Solutions
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