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Start. Finish. Project Scheduling A. A. Elimam. Project Scheduling. Need to plan and control large/time consuming projects. Projects Characteristics. Projects are unique Time Estimation Difficulty Control Decomposition into smaller tasks
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Start Finish Project SchedulingA. A. Elimam
Project Scheduling Need to plan and control large/time consuming projects
Projects Characteristics • Projects are unique • Time Estimation Difficulty • Control • Decomposition into smaller tasks • Responsibility of a task given to a specific individual
Project Management: Stages 1. Define: Describe goal or Final outcome of Project 2. Plan: Identify tasks / resources / time 3. Execute / Control: Time-cost Trade-off
Activity The smallest unit of work effort consuming both time and resources that the project manager can schedule and control.
Precedence Relationship A sequencing constraint between interrelated activities by which one activity cannot start until a preceeding activity has been completed.
Schedule A plan that sets priorities, determines start and finish times, and allocates resources to accomplish the activities.
Examples • Constructing a building or amusement park • Constructing a road, dam, or oil pipeline • Renovating a blighted urban area • Developing a prototype for a new airplane • Installing a large computer system • Introducing a new product • Organizing a state fair • Redesigning an office layout
Measuring Success of a project Conformance Time Budget
Basic Questions 1. Project completion time? 2. Critical activities? 3. Activities that can be delayed? How Long? 4. Starting / ending time of each activity? 5. Range of $’s spent on project? 6. Time-cost trade-off
Project Management Basic Steps i. Describe project ii. Draw a network diagram iii. Provide time estimates iv. Analyze network v. Develop project plan vi. Update project plan
i. Describe project • Activities / precedence • end points
ii. Draw a network diagram • AOA: Arcs: Activities Nodes: Event • AON: Nodes: Activities Arcs: Sequence
AOA and AON relationships Event Activity A A 1 Activity Event Event C 3 4 C Activity Event B 2 B (a) AOA approach: Event 4 cannot take place until activities A, B and C have been completed. (b) AON approach: Activity C cannot take place until activities A and B completed. Implies time and resource consumption Software
AOA AON Activity Relationships Activity Relationship
AOA AON S T U S T U 1 2 3 4 Activity Relationships Activity Relationship S precedes T, which precedes U.
AOA AON 1 S S U 3 4 U T 2 T Activity Relationships Activity Relationship S and T must be completed before U can be started.
AOA AON 3 T T S 1 2 S U 4 U Activity Relationships Activity Relationship T and U cannot begin until S has been completed.
AOA AON 1 4 S U S U 3 T V 2 5 T V Activity Relationships Activity Relationship U and V cannot begin until both S and T have been completed.
AOA AON S U 1 3 5 S U Dummy T V 2 4 6 T V Activity Relationships Activity Relationship U cannot begin until both S and T have been completed; V cannot begin until T has been completed.
AOA AON S T V 1 2 4 5 S T V Dummy U 3 U Activity Relationships Activity Relationship T and U cannot begin until S has been completed; V cannot begin until both T and U have been completed.
iii. Provide Time Estimates • Deterministic CPM Critical Path Method or • Probabilistic PERT Program Evaluation and Review Technique then CPM
iv. Analyze Network • Identify critical path (CP) and activities on it • Estimate probability of completing project on time • Explore time-cost trade-off
v. Develop project plan • Schedule each activity (particularly on CP) • Monitor actual planned.
vi. Update project plan • Adjust schedule on the basis of actuals
Immediate Activity Description Predecessor(s) A Select administrative and medical staff. B Select site and do site survey. C Select equipment. D Prepare final construction plans and layout. E Bring utilities to the site. F Interview applicants and fill positions in nursing, support staff, maintenance, and security. G Purchase and take delivery of equipment. H Construct the hospital. I Develop and information system. J Install the equipment. K Train nurses and support staff. St. Adolf’s Hospital
Immediate Activity Description Predecessor(s) A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J St. Adolf’s Hospital
Immediate Activity Description Predecessor(s) A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A Start St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A Start B St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A Start C B St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A Start C B D St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A Start C B D E St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A F Start C B D E St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A F Start C G B D E St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A F Start C G B D H E St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) I A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A F Start C G B D H E St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) I A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A F Start C G B D H J E St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) I A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A F K Start C G B D H J E St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) I A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A F K Start C G Finish B D H J E St. Adolf’s Hospital AON Network
Immediate Activity Description Predecessor(s) I 15 A Select administrative and medical staff. — B Select site and do site survey. — C Select equipment. A D Prepare final construction plans and layout. B E Bring utilities to the site. B F Interview applicants and fill positions in nursing, support staff, maintenance, and security. A G Purchase and take delivery of equipment. C H Construct the hospital. D I Develop and information system. A J Install the equipment. E,G,H K Train nurses and support staff. F,I,J A F K 12 10 6 C G Start Finish 10 35 B D H J 9 10 40 4 E 24 St. Adolf’s Hospital Completion Time
I 15 F 10 A 12 K 6 C 10 G 35 Start Finish H 40 J 4 B 9 D 10 E 24 St. Adolf’s Hospital Earliest Start and Earliest Finish Times
St. Adolf’s Hospital I 15 Earliest start time F 10 A 12 K 6 0 C 10 G 35 Start Finish H 40 J 4 B 9 D 10 Earliest Start and Earliest Finish Times E 24
St. Adolf’s Hospital I 15 Earliest finish time Earliest start time F 10 A 12 K 6 0 12 C 10 G 35 Start Finish H 40 J 4 B 9 D 10 Earliest Start and Earliest Finish Times E 24
St. Adolf’s Hospital I 15 F 10 A 12 K 6 0 12 C 10 G 35 Start Finish H 40 J 4 B 9 D 10 0 9 Earliest Start and Earliest Finish Times E 24
St. Adolf’s Hospital I 15 F 10 A 12 K 6 0 12 C 10 G 35 Start Finish H 40 J 4 B 9 D 10 9 19 0 9 Earliest Start and Earliest Finish Times E 24 9 33
St. Adolf’s Hospital I 15 12 27 F 10 A 12 K 6 0 12 12 22 C 10 G 35 12 22 Start Finish H 40 J 4 B 9 D 10 9 19 0 9 Earliest Start and Earliest Finish Times E 24 9 33
St. Adolf’s Hospital I 15 12 27 F 10 A 12 K 6 0 12 12 22 C 10 G 35 12 22 Start Finish H 40 J 4 B 9 D 10 9 19 19 59 0 9 Earliest Start and Earliest Finish Times E 24 9 33
St. Adolf’s Hospital I 15 12 27 F 10 A 12 K 6 0 12 12 22 C 10 G 35 12 22 22 57 Start Finish H 40 J 4 B 9 D 10 9 19 19 59 0 9 Earliest Start and Earliest Finish Times E 24 9 33
St. Adolf’s Hospital I 15 12 27 F 10 A 12 K 6 0 12 12 22 C 10 G 35 12 22 22 57 Start Finish H 40 J 4 B 9 D 10 9 19 19 59 59 63 0 9 Earliest Start and Earliest Finish Times E 24 9 33
I 15 12 27 F 10 A 12 K 6 0 12 63 69 12 22 C 10 G 35 12 22 22 57 Start Finish H 40 J 4 B 9 D 10 9 19 19 59 59 63 0 9 E 24 9 33 St. Adolf’s Hospital Earliest Start and Earliest Finish Times