Theme 3 Topic 9 - Critical Path Analysis Flashcards
Define Critical Path Analysis
Using a network diagram to show the tasks taken to complete a project in the minimum time possible
What does a critical path analysis show?
The sequence of activities required for the project and the order in which they can be completed
What is the purpose of a critical path analysis?
To plan projects in a way which enables a project to be completed in the shortest time possible
What three things does a manager need to know to use the technique?
What different tasks are involved, The length of time each task is expected to take, The order the tasks must be completed in
Define Node
Circles representing a point in time at the start or end of an activity, They are split into three
Define Earliest Start Time (EST)
The top right segment of the node showing the earliest time an activity can begin
What does the EST depend on?
The completion of the previous activity
Define Latest Finishing Time (LST)
The bottom right segment of the node showing the latest time an activity can finish without delaying the overall project
Define Node Numbers
The left half of the node showing a unique identity for each node
What do the arrows/lines represent?
Production activities
Which way must arrows/lines go and what should they have at each end?
Left to right and must begin and end with a node
What is above the arrows/lines?
A letter or description of the activity that the line represents
What is below the arrows/lines?
A number which represents the length of time it takes to complete that activity
Define Critical Path
The sequence of activities in a project that must be completed within a designated time in order to prevent any delay in overall completion of the project
What symbol is used to show the critical path?
//
Define Total Float
The amount of time that an activity can be delayed by without delaying the entire project
Total Float for an Activity =
LFT - Duration of Activity - EST
What are three advantages of critical path analysis?
Shows managers which activities can be done simultaneously, Managers can focus on ‘critical activities’ to avoid delaying the overall completion time, Forces managers to think ahead
What are three disadvantages of critical path analysis?
Complex activities may be difficult to represent in a network, If the estimated times are incorrect the diagram will be inaccurate, Often encourages managers to focus on speed rather than quality
Why does critical path analysis not guarantee success?
Success depends on the motivation and efforts of the staff and management as to whether they can carry out each activity to the scheduled time
