This preview shows page 1. Sign up to view the full content.
Unformatted text preview: FGI; and ADFGI. Project completion time is reduced
from 18 to 16 weeks. 1 HW4 Solution OPER3100 Spring 2013 2. For the following diagram, (a) indicate the critical path when normal activity times are used; (b) How
many days will the project take if we willing to pay crashing cost as long as it is less than $1,000 (daily
indirect cost)?
a.
Activity Normal Time A
B
C
D
E
F 6
10
5
4
9
2 Cost per Day to
Crash
$500
$300
$700
$600
$800 Crash Time
6
8
4
1
7
1 A(6) Available Days
2
1
3
2
1 B(10) Start F(2)
C(5) D(4) E(9) Length After Crashing n Days
Path n=0 1 2 3 4 A B F 18 18 18 17 16 C D E F 20 19 18 17 16 Activity Crashed C E F B&E Direct Costs to Crash $300<$,1000 $600<$1,000 $800<$1,000 $1,100>$1,000 We can only crash 3 days since the direct cost to crash the 4th day is $500+$600=$1,100, which is
greater than the indirect cost benefit $1,000. Therefore, the optimal project duration of 18 days. 2...
View
Full
Document
This note was uploaded on 02/26/2013 for the course OPER 3100 taught by Professor Staff during the Spring '08 term at UNC Charlotte.
 Spring '08
 Staff

Click to edit the document details