Schedule Lag Drag
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Transcript of Schedule Lag Drag
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!