上海交通大学：《工程项目管理 Engineering Project Management》教学资源（PPT课件）Chapter 6 Scheduling

上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY Project Management Dr.HU Hao 六漏 School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University 2012

Project Management Dr. HU Hao School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University 2012

图 上游充通大学 SHANGHAI JLAO TONG UNIVERSITY Part 2 PROJECT PLANNING AND CONTROL Chapter 6 Scheduling

Part 2 PROJECT PLANNING AND CONTROL Chapter 6 Scheduling

上游充通大粤 SHANGHAI JIAO TONG UNIVERSITY Learning Objectives Estimating the duration for each activity Establishing the estimated start time and required completion time for the overall project Calculating the earliest times at which each activity can start and finish,based on the project's estimated start time Calculating the latest times by which each activity must start and finish in order to complete the project by its required completion time Determining the amount of positive or negative slack between the time each activity can start or finish and the time it must start or finish Identifying the critical(longest)path of activities

Learning Objectives Estimating the duration for each activity Establishing the estimated start time and required completion time for the overall project Calculating the earliest times at which each activity can start and finish, based on the project’s estimated start time Calculating the latest times by which each activity must start and finish in order to complete the project by its required completion time Determining the amount of positive or negative slack between the time each activity can start or finish and the time it must start or finish Identifying the critical (longest) path of activities

上游充通大学 Activity Duration Estimates SHANGHAI JIAO TONG UNIVERSITY The first step in establishing a project schedule is to estimate the duration of each activity Estimated duration should include the time required to perform the work plus any associated waiting time Representation in the network AlB:in the lower-right-hand corner of the box AOA:below the arrow Activity Description of activity Description Person in Estimated 入 Duration Number charge duration Estimate Event Event Number Number

The first step in establishing a project schedule is to estimate the duration of each activity Estimated duration should include the time required to perform the work plus any associated waiting time Representation in the network • AIB: in the lower-right-hand corner of the box • AOA: below the arrow Activity Duration Estimates Description of activity Number Person in charge Estimated duration Activity Description Duration Estimate Event Number Event Number

上浒充通大粤 Activity Duration Estimates(Cont.) SHANGHAI JIAO TONG UNIVERSITY Who will estimate the activity duration The person who will perform the activity Experienced individual makes estimates for all the activities for which the organization or subcontractors is responsible Estimates should be based resource available Estimates should be aggressive and realistic Delays and accelerations will ten to cancel one another out Duration of dummy activities is 0

Activity Duration Estimates (Cont.) Who will estimate the activity duration • The person who will perform the activity • Experienced individual makes estimates for all the activities for which the organization or subcontractors is responsible Estimates should be based resource available Estimates should be aggressive and realistic Delays and accelerations will ten to cancel one another out Duration of dummy activities is 0

上游充通大粤 Project Start and Finish Time SHANGHAI JIAO TONG UNIVERSITY Estimated start time Required completion time The project's required completion time is normally a part of the project objective and stated in the contract Sometimes the overall project time is stated in terms of a cycle time rather than a specific calendar time Estimated start time can be defined as 0

Project Start and Finish Time Estimated start time Required completion time The project’s required completion time is normally a part of the project objective and stated in the contract Sometimes the overall project time is stated in terms of a cycle time rather than a specific calendar time Estimated start time can be defined as 0

上游充通大粤 Schedule Calculations SHANGHAI JLAO TONG UNIVERSITY The earliest times at which each activity can start and finish, based on the project's estimated start time. The latest times by which each activity must start and finish in order to complete the project by its required completion time

Schedule Calculations The earliest times at which each activity can start and finish, based on the project’s estimated start time. The latest times by which each activity must start and finish in order to complete the project by its required completion time

图 上游充通大粤 Earliest Start and Finish Time SHANGHAI JLAO TONG UNIVERSITY Earliest Start Time ES-the earliest time at which a particular activity can begin Earliest Finish Time EF-the earliest time at which a particular activity can be completed EF=ES+Duration Estimate

Earliest Start and Finish Time Earliest Start Time ES — the earliest time at which a particular activity can begin Earliest Finish Time EF — the earliest time at which a particular activity can be completed EF = ES + Duration Estimate

上游充通大学 SHANGHAI JIAO TONG UNIVERSITY Earliest Start and Finish Time(Cont.) Calculating forward Working through the network diagram from the beginning of project to the end of the project. ©Rule1 The earliest start time for a particular activity must be the same as or later than the latest of all the earliest finish time of all the activities leading directly into that particular activity

Earliest Start and Finish Time (Cont.) Calculating forward • Working through the network diagram from the beginning of project to the end of the project. Rule 1 • The earliest start time for a particular activity must be the same as or later than the latest of all the earliest finish time of all the activities leading directly into that particular activity

上游充通大粤 SHANGHAI JIAO TONG UNIVERSITY Earliest Start and Finish Time(Cont.) Example: Textbook Page 164/FIGURE 6.6 Textbook Page 166/FIGURE 6.7

Earliest Start and Finish Time (Cont.) Example: • Textbook Page 164 / FIGURE 6.6 • Textbook Page 166 / FIGURE 6.7