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TUTORIAL: CHAPTER 3.1

1. The following table contains information on the cost to run three jobs on four available

machines. Determine the assignment plan that will minimize costs.

MACHINE

JOB

A B C D1 12 16 14 10

2 9 1! "3 1# 12 9 11

2.The time re$uire% to complete each of eight jobs in a two&machine flow shop are shown in

Table Q4(b).

i' Determine a se$uence that will minimize ma(espan time.ii' )onstruct a *ohnson chart.

+4 mar(s'

Table Q4(b)

Job

Time (hours)

Mahi!eA

Mahi!eB

a 16 #

b ! 1!

c 9 6

% "

e 2 14

f 12 4

g 1 14

h 20 11

!. , shoe repair operation uses a two steps se$uences an% the operation time is provi%e% inTable Q4(b)"

i' -in% the se$uence that will minimize total completion time.ii' Determine the amount of i%le time for wor(station 2.iii' Determine total completion time.

+4 mar(s'Table Q4(b)

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#or$s%a%io!

Job Times (mi!u%es)

A B C D E

1 2" 1 "0 26 1#

2 4# !! !0 24 10