Project Management Planning Techniques

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Presentation transcript:

Project Management Planning Techniques Project manager responsible for developing project implementation plan. Duties includes: Defining tasks Making estimates (cost and timing) Preparing schedules Preparing budgets

Project Management Recall the house construction example: Task Definition: Description Duration(days) Precedence Step A: Prepare site. 5 - Step B: Build foundation. 8 A Step C: Frame walls and roof. 15 B Step D: Rough in Plumbing 12 C Step E: Rough in Electrical 10 C Step F: HVAC Venting 8 C Step G: Drywall 11 D,E,F Step H: Finish Electrical 5 G Step I: Finish Plumbing 4 G Step J: Finish HVAC 2 H Step K: Install Kitchen 8 H,I Step L: Install Baths 14 H,I Step M: Paint 5 J,K,L Step N: Landscape 5 J,K,L

Project Management Precedence Diagram Tasks must sometimes be performed in series, or may at times be performed in parallel. For the house example, let each arc represent a project task/job. Each arc is identified by a job letter and duration. Note the dummy jobs indicating precedence that jobs H and I must complete before K or L begins. J,2 D,12 H,5 7 M,5 K,8 A,5 B,8 C,15 G,11 E,10 1 2 3 4 5 6 9 10 11 L,14 N,5 F,8 I,4 8

Project Management Timing – Gantt Chart Tasks and task durations are often represented as Gantt Charts. With task precedence knowledge.

Project Management Critical Path 7 1 2 3 4 5 6 9 10 11 8 J,2 D,12 H,5 K,8 A,5 B,8 C,15 G,11 E,10 1 2 3 4 5 6 9 10 11 L,14 N,5 F,8 I,4 8

Project Management Exercise – Task Definition Define tasks, duration and precedence for the Term Project. Description Duration(days) Precedence Form teams and select leader 1 -

Project Management Exercise – Precedence Diagram Create precedence diagram for the Term Project, and identify critical path. A,1 1 2

Project Management Exercise – Schedule/Gantt Chart Create a schedule in the form of a Gantt chart for the Term Project.

Project Management Exercise – Cost Estimation / Resource Allocation Estimate cost and define/allocate resource requirements for the Term Project. Note, your costs will be in time not $’s. Description Cost Resources Form teams and select leader .25 hours All

Expediting/Crashing CPM – Critical Path Method Can normal task times be reduced? Is there an increase in direct costs? Additional manpower Additional machines Overtime, etc… Can there be a reduction in indirect costs? Less overhead costs Less daily rental charges Bonus for early completion Avoid penalties for running late Avoid cost of late startup CPM addresses these cost trade-offs.

CPM – Critical Path Method Example: Overhead cost = $5/day

CPM – Critical Path Method Enumerative Approach: Reduce job H by 1 day: Total Cost improves by $5 - $4 = $1. Reduce job A by 2 days: Total cost improves by $10 - $8 = $2. Reduce job A by an additional day, and job B by a day? Total cost improves by $5 - $4 - $2 = -$1. Therefore do not take this action. Reduce job A by an additional day, and job C by a day? Total cost Evaluate combinations of reducing path 3-4-6 and 3-5-6 by one day. D & E = $5 - $3 - $3 = -$1 F & E = $5 - $5 - $3 = -$3 D & G = $5 - $3 - $1 = $1 F & G = $5 - $5 - $1 = -$1 Therefore, reduce job D & G by 1 day: TC improves by $5 - $3 -$1 = $1. Overall improvement: $1 + $2 + $1 = $4.