3 - 1© 2011 Pearson Education 3 3 Managing Projects PowerPoint presentation to accompany Heizer and Render Operations Management, 10e, Global Edition Principles.

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3 - 1© 2011 Pearson Education 3 3 Managing Projects PowerPoint presentation to accompany Heizer and Render Operations Management, 10e, Global Edition Principles of Operations Management, 8e, Global Edition PowerPoint slides by Jeff Heyl

3 - 2© 2011 Pearson Education  Single unit  Many related activities  Difficult production planning and inventory control  General purpose equipment  High labor skills Project Characteristics

3 - 3© 2011 Pearson Education Examples of Projects  Building Construction  Research Project

3 - 4© 2011 Pearson Education Operation Management of Projects 1.Planning - goal setting, defining the project, team organization 2.Scheduling - relates people, money, and supplies to specific activities and activities to each other 3.Controlling - monitors resources, costs, quality, and budgets; revises plans and shifts resources to meet time and cost demands

3 - 5© 2011 Pearson Education  Planning  Objectives  Resources  Work break-down structure  Organization  Scheduling  Project activities  Start & end times  Network  Controlling  Monitor, compare, revise, action Project Management Activities

3 - 6© 2011 Pearson Education  Establishing objectives  Defining project  Creating work breakdown structure  Determining resources  Forming organization Project Planning

3 - 7© 2011 Pearson Education Project Organization Works Best When 1.Work can be defined with a specific goal and deadline 2.The job is unique or somewhat unfamiliar to the existing organization 3.The work contains complex interrelated tasks requiring specialized skills 4.The project is temporary but critical to the organization 5.The project cuts across organizational lines

3 - 8© 2011 Pearson Education The Role of the Project Manager Highly visible Responsible for making sure that: 1.All necessary activities are finished in order and on time 2.The project comes in within budget 3.The project meets quality goals 4.The people assigned to the project receive motivation, direction, and information

3 - 9© 2011 Pearson Education The Role of the Project Manager Highly visible Responsible for making sure that: 1.All necessary activities are finished in order and on time 2.The project comes in within budget 3.The project meets quality goals 4.The people assigned to the project receive motivation, direction, and information Project managers should be:  Good coaches  Good communicators  Able to organize activities from a variety of disciplines

3 - 10© 2011 Pearson Education Purposes of Project Scheduling 1.Shows the relationship of each activity to others and to the whole project 2.Identifies the precedence relationships among activities 3.Encourages the setting of realistic time and cost estimates for each activity 4.Helps make better use of people, money, and material resources by identifying critical bottlenecks in the project

3 - 11© 2011 Pearson Education  Gantt chart  Critical Path Method (CPM)  Program Evaluation and Review Technique (PERT) Project Management Techniques

3 - 12© 2011 Pearson Education A Simple Gantt Chart Time J F M A M J J A S Design Prototype Test Revise Production

3 - 13© 2011 Pearson Education  Network techniques  Developed in 1950’s  CPM by DuPont (1957)  PERT by Booz, Allen & Hamilton with the U.S. Navy, (1958)  Consider precedence relationships and interdependencies  Each uses a different estimate of activity times PERT and CPM

3 - 14© 2011 Pearson Education Six Steps PERT & CPM 1.Define the project and prepare the work breakdown structure 2.Develop relationships among the activities - decide which activities must precede and which must follow others 3.Draw the network connecting all of the activities

3 - 15© 2011 Pearson Education Six Steps PERT & CPM 4.Assign time and/or cost estimates to each activity 5.Compute the longest time path through the network – this is called the critical path 6.Use the network to help plan, schedule, monitor, and control the project

3 - 16© 2011 Pearson Education AON Example ActivityDescription Immediate Predecessors ABuild internal components— BModify roof and floor— CConstruct collection stackA DPour concrete and install frameA, B EBuild high-temperature burnerC FInstall pollution control systemC GInstall air pollution deviceD, E HInspect and testF, G Milwaukee Paper Manufacturing's Activities and Predecessors Table 3.1

3 - 17© 2011 Pearson Education AON Network for Milwaukee Paper A Start B Start Activity Activity A (Build Internal Components) Activity B (Modify Roof and Floor) Figure 3.6

3 - 18© 2011 Pearson Education AON Network for Milwaukee Paper Figure 3.7 C D A Start B Activity A Precedes Activity C Activities A and B Precede Activity D

3 - 19© 2011 Pearson Education AON Network for Milwaukee Paper G E F H C A Start DB Arrows Show Precedence Relationships Figure 3.8

3 - 20© 2011 Pearson Education Determining the Project Schedule Perform a Critical Path Analysis  The critical path is the longest path through the network  Any delay in critical path activities delays the project  Critical path activities have no slack time

3 - 21© 2011 Pearson Education Determining the Project Schedule Perform a Critical Path Analysis Table 3.2 ActivityDescriptionTime (weeks) ABuild internal components2 BModify roof and floor3 CConstruct collection stack2 DPour concrete and install frame4 EBuild high-temperature burner4 FInstall pollution control system 3 GInstall air pollution device5 HInspect and test2 Total Time (weeks)25

Determine the CP ACFH = = 9 weeks ACEGH = = 15 weeks ADGH = = 13 weeks BDGH = = 14 weeks Critical path is the longest path on the network (ACEGH = 15 week) © 2011 Pearson Education

3 - 23© 2011 Pearson Education Determining the Project Schedule Perform a Critical Path Analysis Table 3.2 ActivityDescriptionTime (weeks) ABuild internal components2 BModify roof and floor3 CConstruct collection stack2 DPour concrete and install frame4 EBuild high-temperature burner4 FInstall pollution control system 3 GInstall air pollution device5 HInspect and test2 Total Time (weeks)25 Earliest start (ES) =earliest time at which an activity can start, assuming all predecessors have been completed Earliest finish (EF) =earliest time at which an activity can be finished Latest start (LS) =latest time at which an activity can start so as to not delay the completion time of the entire project Latest finish (LF) =latest time by which an activity has to be finished so as to not delay the completion time of the entire project

3 - 24© 2011 Pearson Education Determining the Project Schedule Perform a Critical Path Analysis Figure 3.10 A Activity Name or Symbol Earliest Start ES Earliest Finish EF Latest Start LS Latest Finish LF Activity Duration 2

3 - 25© 2011 Pearson Education Forward Pass Begin at starting event and work forward Earliest Start Time Rule:  If an activity has only a single immediate predecessor, its ES equals the EF of the predecessor  If an activity has multiple immediate predecessors, its ES is the maximum of all the EF values of its predecessors ES = Max {EF of all immediate predecessors}

3 - 26© 2011 Pearson Education Forward Pass Begin at starting event and work forward Earliest Finish Time Rule:  The earliest finish time (EF) of an activity is the sum of its earliest start time (ES) and its activity time EF = ES + Activity time

3 - 27© 2011 Pearson Education ES/EF Network for Milwaukee Paper Start 0 0 ES 0 EF = ES + Activity time

3 - 28© 2011 Pearson Education ES/EF Network for Milwaukee Paper Start A2A2 2 EF of A = ES of A ES of A

3 - 29© 2011 Pearson Education B3B3 ES/EF Network for Milwaukee Paper Start A2A EF of B = ES of B ES of B

3 - 30© 2011 Pearson Education C2C2 24 ES/EF Network for Milwaukee Paper B3B3 03 Start A2A2 20

3 - 31© 2011 Pearson Education C2C2 24 ES/EF Network for Milwaukee Paper B3B3 03 Start A2A2 20 D4D4 7 3 = Max (2, 3)

3 - 32© 2011 Pearson Education D4D4 37 C2C2 24 ES/EF Network for Milwaukee Paper B3B3 03 Start A2A2 20

3 - 33© 2011 Pearson Education E4E4 F3F3 G5G5 H2H D4D4 37 C2C2 24 ES/EF Network for Milwaukee Paper B3B3 03 Start A2A2 20 Figure 3.11

3 - 34© 2011 Pearson Education Backward Pass Begin with the last event and work backwards Latest Finish Time Rule:  If an activity is an immediate predecessor for just a single activity, its LF equals the LS of the activity that immediately follows it  If an activity is an immediate predecessor to more than one activity, its LF is the minimum of all LS values of all activities that immediately follow it LF = Min {LS of all immediate following activities}

3 - 35© 2011 Pearson Education Backward Pass Begin with the last event and work backwards Latest Start Time Rule:  The latest start time (LS) of an activity is the difference of its latest finish time (LF) and its activity time LS = LF – Activity time

3 - 36© 2011 Pearson Education LS/LF Times for Milwaukee Paper E4E4 F3F3 G5G5 H2H D4D4 37 C2C2 24 B3B3 03 Start A2A2 20 LF = EF of Project 1513 LS = LF – Activity time

3 - 37© 2011 Pearson Education LS/LF Times for Milwaukee Paper E4E4 F3F3 G5G5 H2H D4D4 37 C2C2 24 B3B3 03 Start A2A2 20 LF = Min(LS of following activity) 1013

3 - 38© 2011 Pearson Education LS/LF Times for Milwaukee Paper E4E4 F3F3 G5G5 H2H D4D4 37 C2C2 24 B3B3 03 Start A2A2 20 LF = Min(4, 10) 42

3 - 39© 2011 Pearson Education LS/LF Times for Milwaukee Paper E4E4 F3F3 G5G5 H2H D4D4 37 C2C2 24 B3B3 03 Start A2A

3 - 40© 2011 Pearson Education Computing Slack Time After computing the ES, EF, LS, and LF times for all activities, compute the slack or free time for each activity  Slack is the length of time an activity can be delayed without delaying the entire project Slack = LS – ES or Slack = LF – EF

3 - 41© 2011 Pearson Education Computing Slack Time Table 3.3 EarliestEarliestLatestLatestOn StartFinishStartFinishSlackCritical ActivityESEFLSLFLS – ESPath A02020Yes B03141No C24240Yes D37481No E48480Yes F No G Yes H Yes

3 - 42© 2011 Pearson Education Critical Path for Milwaukee Paper E4E4 F3F3 G5G5 H2H D4D4 37 C2C2 24 B3B3 03 Start A2A

3 - 43© 2011 Pearson Education Advantages of PERT/CPM 1.Especially useful when scheduling and controlling large projects 2.Straightforward concept and not mathematically complex 3.Graphical networks help highlight relationships among project activities 4.Critical path analyses help the activities that need to be closely watched

3 - 44© 2011 Pearson Education Advantages of PERT/CPM 5.Project documentation and graphics point out who is responsible for various activities 6.Applicable to a wide variety of projects 7.Useful in monitoring not only schedules but costs as well

3 - 45© 2011 Pearson Education 1.Project activities have to be clearly defined, independent, and stable in their relationships 2.Precedence relationships must be specified and networked together 3.Time estimates tend to be subjective and are subject to managers orientation 4.There is an inherent danger of too much emphasis being placed on the longest, or critical, path Limitations of PERT/CPM

The End © 2011 Pearson Education