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!