schedule lag drag
DESCRIPTION
Explains problem of Start to Start and Finish to Finish lag calculations dragging the Early Start to right.TRANSCRIPT
Scheduling 102A Solution to the Problem of Lag Drag
Dr. Raphael DuaCEO & OwnerMicroplanning International Asia Pacific P/L
Progressive Feed Activities
1 2 3
4 5 6 7
8 9 10 11
12 13 14
A1 A2 A3
B1
B2 B3
C1
C2
D2 D3
A = TOOL MANUFACTUREB = PARTS MANUFACTURE
C = ASSEMBLY MANUFACTURED = UNITS MANUFACTURE
The Ladder Convention
The Ladder Convention
Basic Element of a Ladder
Make Parts
Make Last Parts
Make First Parts
Basic Element of a Ladder
ES(i,j) = PEE(i)
Basic Element of a Ladder
PrecEvent
Or i node
SuccEvent
Or j node
PEE PEL SEE SEL
ESLS
EFLF
Duration d
PEE = Preceding Event EarliestPEL = Preceding Event LatestES = Earliest Start LS = Latest Start
SEE = Succeeding Event EarliestSEL = Succeeding Event LatestEF = Earliest FinishLF = Latest Finish
Calculating a Ladder
Progressive Feed
10Dur = 1
11Dur = 15
13Dur = 9
15Dur = 8
17Dur = 3
1
3 3
1
Progressive Feed
Progressive Feed
Progressive Feed
Progressive Feed
Thank YouFor Attending!