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Planning & scheduling
more complex projects
   helps to schedule and manage complex
    projects
   developed to control large defense projects
   help to plan all tasks that must be completed
   helps to see where remedial actions needs to
    be taken
   helps to identify the minimum length of time
    needed to complete a project
   helps to identify which project steps should
    be accelerated to complete the project at time
   you cannot start some activities until others
    are finished (sequential activities)



   other activities are not dependent on
    completion of any other task (parallel tasks)
   Step 1: List all activities in the plan

    ◦ For each activity show:

                   The earliest start date
                   Estimated length of time it will take
                   Whether it is parallel or sequential
                   For sequential tasks, show which stage they depend on
   Step 2: Plot the activities as a circle and arrow
    diagrams
    ◦ Cicles show events within the project, such as start
      and finish of tasks
      The number shown in the left hand half allows to
       identify each one easily
    ◦ An arrow running between two circles shows the
      activity needed to complete that task
      A task description is written underneath the arrow
      The length of the task is shown above it
Critical path analysis
   You may find that you need to complete a
    project earlier than your CPA says is possible



   You need to re-plan the project
 A variation on CPA that takes a slightly more
  skeptical view of time estimates made for
  each project stage
 Time to use for each stage:
T=(shortest time+4*likely time+ longest time)/6

   This helps to bias time estimates away from
    the unrealistically short time-scales normally
    assumed
   What tasks must be carried out.
   Where parallel activity can be performed.
   The shortest time in which you can complete
    a project.
   Resources needed to execute a project.
   The sequence of activities, scheduling and
    timings involved.
   Task priorities.
   The most efficient way of shortening time on
    urgent projects.

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Critical path analysis

  • 1. Planning & scheduling more complex projects
  • 2. helps to schedule and manage complex projects  developed to control large defense projects  help to plan all tasks that must be completed  helps to see where remedial actions needs to be taken  helps to identify the minimum length of time needed to complete a project  helps to identify which project steps should be accelerated to complete the project at time
  • 3. you cannot start some activities until others are finished (sequential activities)  other activities are not dependent on completion of any other task (parallel tasks)
  • 4. Step 1: List all activities in the plan ◦ For each activity show:  The earliest start date  Estimated length of time it will take  Whether it is parallel or sequential  For sequential tasks, show which stage they depend on
  • 5. Step 2: Plot the activities as a circle and arrow diagrams ◦ Cicles show events within the project, such as start and finish of tasks  The number shown in the left hand half allows to identify each one easily ◦ An arrow running between two circles shows the activity needed to complete that task  A task description is written underneath the arrow  The length of the task is shown above it
  • 7. You may find that you need to complete a project earlier than your CPA says is possible  You need to re-plan the project
  • 8.  A variation on CPA that takes a slightly more skeptical view of time estimates made for each project stage  Time to use for each stage: T=(shortest time+4*likely time+ longest time)/6  This helps to bias time estimates away from the unrealistically short time-scales normally assumed
  • 9. What tasks must be carried out.  Where parallel activity can be performed.  The shortest time in which you can complete a project.  Resources needed to execute a project.  The sequence of activities, scheduling and timings involved.  Task priorities.  The most efficient way of shortening time on urgent projects.