Transcript Diapositiva 1

PROJECT MANAGEMENT
Definitions
 WBS = Work Breakdown Structure
 OBS = Organisation Breakdown Structure
 ABS = Activity Breakdown Structure
 PBS = Product Breakdown Structure
 RBS = Resource Breakdown Structure
PROJECT MANAGEMENT
Definitions
 ES = Early Start = the earliest time an activity can start
 EF = Early Finish = the earliest time an activity can finish
 LS = Late Start = the latest time an activity can start
 LF = Late Finish = the latest time an activity can finish
PROJECT MANAGEMENT
Definitions
 TF = Total Float = delayed time to start an activity without changing the
project completion date = LS - ES
 FF = Free Float = how much delay an activity can have without affecting
the beginning of the next activity
PROJECT MANAGEMENT
Exercise
Inizio = Start; Fine = End; Giorni = Days
PROJECT MANAGEMENT
Attività = Activity
Attività A
Attività B
Attività C
ES
1
1
3
EF
6
2
5
LS
1
2
4
LF
6
3
6
TF
0
1
1
FF
0
0
0
PROJECT MANAGEMENT
Focus on B Activity. TF = 8 days; FF = 2 days
PROJECT MANAGEMENT
 TF = 8 days. Activity B can start 8 days later without affecting project
completion.
 FF = 2 days. Activity B can delay 2 days without affecting next activities
PROJECT MANAGEMENT
FORWARD PASS
For each activity (i) we calculate:
EF(i) = ES(i)+Duration(i)-1
ES(i)=MAX( EFprev)+1
BACKWARD PASS
LS(i)=LF(i)-Duration+1
LF(i)=MIN(LSnext)-1
PROJECT MANAGEMENT
 TF(i) = LS(i) – ES(i)
 FF(i) = MIN (ESnext) – EF(i)
 CRITICAL PATH
all activities where TF=0.