4C - Identify the Relationships Between Activities Flashcards
A logical relationship that exists between two project activities.
activity dependency
Inherent to the work itself. It is usually affected by physical constraints. Activities must be performed in a specific sequence for the work to be successful.
mandatory dependency (hard logic)
Defined by the project and the project management team at their discretion. It is defined based on the best practices followed in a specific application area or on specific requirements. If there is no mandatory or external dependency between two activities, the team has some flexibility in activity sequencing.
discretionary dependency (soft logic) (preferential logic) (preferred logic)
Contingent on inputs from outside the project activities.
external dependency
Contingent on inputs from within the organization.
internal dependency
The logical relationship between two activities that describes the sequence in which the activities should be carried out.
precedence relationship
When sequencing two activities, the activity that must take place prior to the other.
predecessor activity
When sequencing two activities, the activity that must take place after to the other and is driven by the relationship.
successor activity
The identification of the dependencies of one activity over the other. It involves establishing the precedence relationships among activities and creating logical sequences.
dependency determination
The precedence relationship between two activities where the predecessor activity must finish before the successor activity can start. It can be expressed as, “Activity A must finish before Activity B can begin.”
FS
What does FS stand for?
Finish-to-Start
The precedence relationship between two activities where the predecessor activity must finish before the successor activity can finish. It can be expressed as, “Activity A must finish before Activity B can finish.”
FF
What does FF stand for?
Finish-to-Finish
The precedence relationship between two activities where the predecessor activity must start before the successor activity can start. It can be expressed as, “Activity A must start before Activity B can start.”
SS
What does SS stand for?
Start-to-Start
The precedence relationship between two activities where the predecessor activity must start before the successor activity can finish. It can be expressed as, “Activity A must start before Activity B can finish.”
SF
What does SF stand for?
Start-to-Finish
A delay in the start of a successor activity.
lag
A change in a logical relationship that allows the successor activity to start before the predecessor activity ends in an FS relationship.
lead
A graphical representation of the sequence of project activities and the dependencies among them.
project schedule network diagram
A project schedule network diagramming method that produces a type of project schedule network diagram that uses rectangular or circular nodes to represent activities and arrows to represent precedence relationships between activities.
PDM
What does PDM stand for?
Precedence Diagramming Method
A group of related activities that are reported as an aggregate activity.
summary activity (hammock activity)
Activity sequences that must be revisited or repeated.
loop
