EBK OM
EBK OM
6th Edition
ISBN: 9781305888210
Author: Collier
Publisher: YUZU
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Chapter 14, Problem 11PA

A

Summary Introduction

Interpretation: Under the given scenario, the sequence that promises a minimized average lateness is to be derived.

Concept Introduction: The process of planning the ordering of the activities involves based on the elements such as, priority, set up time and such other is referred to as sequencing.

A

Expert Solution
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Explanation of Solution

Under the given order rule:

    Job12345678
    JobProcessing TimeFlow TimeDue DateLatenessTardiness
    17721-140
    2310733
    3515877
    421751212
    56231766
    6932161616
    714463888
    8450123838
    Average25.009.5011.25

Average Flow Time will be;

  =7+10+15+17+23+32+46+508=2008=25.00

The average lateness will be;

  =14+3+7+12+6+16+8+388=768=9.50

The average tardiness will be;

  =0+3+7+12+6+16+8+388=908=11.25

Under the SPT rule:

    Job42835167
    JobProcessing TimeFlow TimeDue DateLatenessTardiness
    4225-30
    2357-20
    84912-30
    3514866
    56201733
    17272166
    6936162020
    71450381212
    Average20.384.885.88

Under the EDD rule:

    Job42386517
    JobProcessing TimeFlow TimeDue DateLatenessTardiness
    4225-30
    2357-20
    3510822
    84141222
    69231677
    5629171212
    1736211515
    71450381212
    Average21.135.636.25

The comparisons will be as follows:

    AFTALAT
    FCFS25.009.5011.25
    SPT20.384.885.88
    EDD21.135.636.25

Upon observing the above derived observations, it can be concluded that the sequence that minimizes the AL is EDD:

    42386517

B

Summary Introduction

Interpretation: Under the given scenario, the sequence that promises a minimized average tardiness is to be calculated.

Concept Introduction: The process of planning the ordering of the activities involves based on the elements such as, priority, set up time and such other is referred to as sequencing.

B

Expert Solution
Check Mark

Explanation of Solution

Upon observing the above derived observations, it can be concluded that the sequence that minimizes the AT is SPT:

    42835167

C

Summary Introduction

Interpretation: In a generalized manner, the logic is to be placed into a procedure that aids in accomplishing these objects for most of the time.

Concept Introduction: The process of planning the ordering of the activities involves based on the elements such as, priority, set up time and such other is referred to as sequencing.

C

Expert Solution
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Explanation of Solution

The logic here is so simple. Supposing that the flow time need to be minimized then the SPT need to be implemented. The advantage of the SPT here is that it minimizes the average job flow time and WIP inventory and also thereby maximizes the resource allocation.

On the other hand, the EDD rule minimizes the average tardiness and lateness and in that it does the best job.

Once the data of processing time, the due date of the single machine are accomplished and the tardiness can easily be minimized, the firm does the best.

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