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9-CriticalPath - Practical estimating and...

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Practical estimating and scheduling ----- Critical Path /“Pert” Charts
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A “Work Breakdown Structure” Work Breakdown Structure Every trackable non-free task Everything How many people, how much time
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some tasks we forget meetings document preparation status and project management customer training
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typical - done once Customer meetings System Spec Review SRS Review Top Level Design Test Plan Review Integration Documentation Customer Site Deployment
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typical - done for each module Detailed Design Code Walk-thru / Review Unit Test
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A Project Management Tool If you’re not doing Critical Paths, you’re not doing project management. Shows the time sequence of events, including parallel efforts. Determines length (calendar time) of a project.
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Required Data List of Activities Activity Duration (best estimate) Sequential Activity Relationships what precedes a task what can be done at the same time what follows a task
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Output Information Activity and Project Completion Time Critical Path / Critical Activities / A delay here will delay the entire project Activity Slack – a single activity not in the critical path has extra time to complete
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Pert Chart tasks a and b can start simultaneously task c can start after a is complete task d can start after b is complete c and d must complete before e can begin 0 A B C&D E a b c d e
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How to… The Next Task Duration The Completion of the Task The Task
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Draw a Pert Chart for this job: Task Title Duration Precedence a. start 0 - b. think 1 a c. plan 2 b d. procrastinate 5 a e. assign to someone else 1 c,d f. hide 3 e g. finish 1 e h. grab credit 1 f,g
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A B C&D E F F&G D a b d c e f G g 0 1 2 5 1 3 1 Critical Path = A D E F H slack in B C, G H 1 C
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A good first-phase estimate can be done in a day.
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