{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

L17 (CPM)

# L17 (CPM) - CVEN 349 Civil Engineering Project Management...

This preview shows pages 1–14. Sign up to view the full content.

LECTURE # 17 Spring 2010 Dr. Ivan Damnjanovic CVEN 349: Civil Engineering CVEN 349: Civil Engineering Project Management Project Management

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Finding the Critical Path Finding the Critical Path The critical path is the set of events that cannot be delayed without causing an extension of the project
Notation Notation EST(I): Early start time of activity I EFT(I): Early finish time of activity I LST(I): Late start time of activity I LFT(I): Late finish time of activity I

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Example of Notation Example of Notation 2 4 2 6 2 6 EST EFT LST LFT Duration Label
Forward Pass Calculations Forward Pass Calculations Need two equations now: 1. EFT(I)=EST(I)+DUR(I) 1. EST(J)=max[EFT(I)] (maximum over all I that precede J)

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Example Example 2 4 3 6 6 8 5 2 4 5 1 2
Step 1: Beginning EST = 0, Find Task 1 EFT Step 1: Beginning EST = 0, Find Task 1 EFT 2 4 3 6 6 8 5 2 4 5 1 2 0 2 EFT(1) = EST(1)+DUR(1) =0+2 = 2

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Step 2: Calculate EST(2), EFT(2) Step 2: Calculate EST(2), EFT(2) 2 4 3 6 6 8 5 2 4 5 1 2 0 2 EST(2) = max{EFT(1)} = 2 2 EFT(2) = 2 + 4 =6 6
Step 3: Calculate EST(3), EFT(3) Step 3: Calculate EST(3), EFT(3) 2 4 3 6 6 8 5 2 4 5 1 2 0 2 EST(3) = max{EFT(2)} = 6 2 EFT(3) = 6 + 6 = 12 6 6 12

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Step 4: Calculate EST(4), EFT(4) Step 4: Calculate EST(4), EFT(4) 2 4 3 6 6 8 5 2 4 5 1 2 0 2 EST(4) = max{EFT(1)} = 2 2 EFT(4) = 2 + 5 = 7 6 6 12 2 7
Step 5: Calculate EST(5), EFT(5) Step 5: Calculate EST(5), EFT(5) 2 4 3 6 6 8 5 2 4 5 1 2 0 2 EST(5) = max{EFT(4),EFT(2)} = max(6,7) = 7 2 EFT(5) = 7+2 = 9 6 6 12 2 7 7 9

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Step 6: Calculate EST(6), EFT(6) Step 6: Calculate EST(6), EFT(6) 2 4 3 6 6 8 5 2 4 5 1 2 0 2 EST(6) = max{EFT(3),EFT(5)} = max(12,9) = 12 2 EFT(6) = 12+8 = 20 6 6 12 2 7 7 9 12 20
Backward Pass Calculations Backward Pass Calculations Need two equations now: 1.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 41

L17 (CPM) - CVEN 349 Civil Engineering Project Management...

This preview shows document pages 1 - 14. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online