1 Question 52 in Cachon Terwiesch 2013 Consider the dependen

1. [Question 5.2 in Cachon, Terwiesch 2013] Consider the dependency matrix and the activity durations (in days) provided below.

c. What is the earliest completion time for activity 3?

d. What is the latest completion time for activity 6?

e. What is the slack time for activity 4?

f. What is the slack time for activity 7?

Dependency Matrix 10 5 2 X 5 10 10 4 Activity: Time: 12 4 4

Solution

C)ES = Maximum (EF) of immediate predecessors

ES=Earliest Start

EF=ES+  t

=4+8

12

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D) LF  = LF - t

LF= Latest Finish time

LF  = LF - t

=12-1

11

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E) Slack =  LF - EF

Activity 4

LF  = LF - t

=5- 8

=3

EF=ES+  t

=8+5

=13

Slack =  LF - EF

= 3 - 13

=10

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F)Slack =  LF - EF

LF  = LF - t

=4-12

=8

EF=ES+  t

= 12 + 4

=16

Slack =  LF - EF

=8  - 16

=8

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1. [Question 5.2 in Cachon, Terwiesch 2013] Consider the dependency matrix and the activity durations (in days) provided below. c. What is the earliest completi
1. [Question 5.2 in Cachon, Terwiesch 2013] Consider the dependency matrix and the activity durations (in days) provided below. c. What is the earliest completi

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