Ch 2 Flashcards
Developing a Network Model
-most important step in using a network as a scheduling tool
8 steps to developing a network model
- defining activities
- ordering of activities
- establish a network model by drawing a diagram
- determine quantities and assign duration to activities
- assign resources and costs
- calculate early and late start/finish times
- compute float values and identify the critical path
- schedule activity start and finish times
defining activities include:
-production/construction
-procurement
-management
-objective of the model
ordering of activities must answer:
-what activities must precede it?
-what activities must follow it?
-what activities must be concurrent with it?
early start time
earliest time an activity can begin based on relationships that exist in the schedule
late start time
latest that an activity can start without impacting the date of object completion
early finish time
the earliest an activity is expected to be completed
late finish time
the latest that an activity can be completed
If the late finish date is exceeded (runs over)……
the project duration can be expected to be increased by the same number of days that the activity is completed beyond the finish time
If the early and late start times differ….
….the activity is said to have flexibility, or “float”
If the early and start dates of an activity are the same….
then the activity has no flexibility, or no “float”
No “float”
In other words, if the activity starts later than the assigned date or if the activity takes longer to complete than the assigned duration, the project completion date will be extended by the same amount of time
critical path
path on the network from beginning to end on which all activities are “critical” meaning any delay in the start date or completion date will extend the project duration
scheduling activity start/finish times
these management decisions revolve around the use of any flexibility or float that the activities possess
