Activity Normal Time Crash Time Cost per day to crash A 6 6 --- B 10 8 $100 C 5

Question

Activity

Normal Time

Crash Time

Cost per day

to crash

A

6

6

---

B

10

8

$100

C

5

4

$300

D

4

1

$700

E

9

7

$500

F

2

1

$650

Determine which activities should be crashed to shorten the project by 1 day

Determine which activities should be crashed to shorten the project by 2 days.

Crash activity B by 1 day and Activity C by 1 day.

Crash activity E by 2 days.

Crash activity C by 1 day and activity E by 1 day.

Crash activity B by 2 days.

Activity

Normal Time

Crash Time

Cost per day

to crash

A

6

6

---

B

10

8

$100

C

5

4

$300

D

4

1

$700

E

9

7

$500

F

2

1

$650

Start

Explanation / Answer

Under normal times the two paths that can be followed are:

ABF = 15 (under normal times)

CDEF = 13 (under normal times)

To shorten the project by one day, any of the activities could be crashed except for A, since the maximum reduction in A possible is zero.

It would be wisest to shorten B as it is the least expensive to crash.

For the next question we determine each of the options:

Hope this helps.

Activity NT CC Cost Max Redn A 6 6 --- 0 B 10 8 $100 2 C 5 4 $300 1 D 4 1 $700 3 E 9 7 $500 2 F 2 1 $650 1

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