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5. A firm that specializes in desktop publishing for local charities has agreed to take on the following jobs. The firm has n

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Answer #1

EDD

JOB

PROCESSING TIME

DUE TIME

FLOW TIME

JOB LATENESS

C

7

21

0 + 7 = 7

B

15

25

7 + 15 = 22

A

20

30

22 + 20 = 42

12

E

31

58

42 + 31 = 73

15

D

25

80

73 + 25 = 98

18


TOTAL FLOW TIME = 7 + 22 + 42 + 73 + 98 = 242

AVERAGE COMPLETION TIME = FLOW TIME / N = 242 / 5 = 48.4

AVERAGE JOB LATENESS = TOTAL JOB LATENESS / N = 45 / 5 = 9

SPT

JOB

PROCESSING TIME

DUE TIME

FLOW TIME

JOB LATENESS

C

7

21

0 + 7 = 7

B

15

25

7 + 15 = 22

A

20

30

22 + 20 = 42

12

D

25

80

42 + 25 = 67

E

31

58

67 + 31 = 98

40

TOTAL FLOW TIME = 7 + 22 + 42 + 67 + 98 = 236

AVERAGE COMPLETION TIME = FLOW TIME / N = 236 / 5 = 47.2

AVERAGE JOB LATENESS = TOTAL JOB LATENESS / N = 52 / 5 = 10.4

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