Wise Talk Thursdays
• Science Behind SchedulingTopic
• One HourPlanned Duration
• Open
Type of
Interaction
• Management Sciences
Area of
Knowl...
Definition
•Brief History and Evaluation of Scheduling
•What is Scheduling
Explanation
•Definition of related terms
•The P...
The concept of Scheduling is not new; Sun Tzu
wrote about scheduling and strategy about
5000 years ago from a military pro...
Henry L Gantt An American engineer and social scientist
invented a bar chart which we know as Gantt Chart - 1917
Kelley an...
 The term Schedule means
 Arrange or plan (an event) to take place at a
particular time.
 Make arrangements for (someon...
 Work Breakdown Structure
 Work Package
 Decomposition
 Rolling Wave Planning
 Schedule Compression
◦ Crashing
◦ Fast...
 Resource Leveling
 Bottom-up Estimating
 Project Network Diagram
 PERT (Program Evaluation and Review
Technique)
 According to Project Management Institute, The
Following is the process from Start to End in order to
create a Project S...
 Activity Definition is a process of defining
the Activities which are part of scope of
work in order to complete the Pro...
 For Activity Sequencing , different
Techniques can be used which are
◦ Precedence Diagramming Method (AON)
◦ Activities ...
◦ Arrow Diagramming Method
◦ Activities can have one type of
dependency under this method which is
 Finish to Start
 Durations in Project Network Diagram are
calculated by using the following
 Early Start
 Early Finish
 Late Start
 L...
 Activity Resource Estimation is a
process where the resources
(physical, human, infrastructure) are
determined
 Top dow...
 Activity Duration Estimation is a process where
the duration against each Activity is calculated.
 Following Techniques...
 PERT Estimation uses the following
concept
◦ Following are some methods to develop
the Project Schedule
◦ Project Network Diagram Method
◦ Critical Path Method, long...
 Suppose we have a project with Following
Activities
 Start
 Requirement Analysis -TASK 1 – 3 Days
 Development - TASK...
 Second Step would be to find the
dependencies among activities and draw a
network diagram
 Lets say we have only Finish...
 Let us Calculate Early Start and Early Finish of
Theses Tasks by Forward Pass.
Science behind scheduling
Science behind scheduling
Science behind scheduling
Science behind scheduling
Science behind scheduling
Science behind scheduling
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Science behind scheduling

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This presentation talks about the scientific approach one should adopt while creating a project schedule. I used some references from PMI and PMBOX.

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Transcript of "Science behind scheduling"

  1. 1. Wise Talk Thursdays
  2. 2. • Science Behind SchedulingTopic • One HourPlanned Duration • Open Type of Interaction • Management Sciences Area of Knowledge
  3. 3. Definition •Brief History and Evaluation of Scheduling •What is Scheduling Explanation •Definition of related terms •The Process of Schedule Development Example •Practical
  4. 4. The concept of Scheduling is not new; Sun Tzu wrote about scheduling and strategy about 5000 years ago from a military prospective Pyramids in Egypt (3000 years ago approx), Transcontinental railways (200 years) ago; None of these could have been accomplished without some sort of scheduling i.e., understanding of activities and sequencing.
  5. 5. Henry L Gantt An American engineer and social scientist invented a bar chart which we know as Gantt Chart - 1917 Kelley and Walker invented CPM -1956-57 The Pert Project invented the name “Critical Path” and everyone else borrowed it -1957 In 1968 PERT and CPM emerged as a standard nomenclatures Dr. Fondhal invented a non- computerized methodology for scheduling which is being used by every scheduling computer package today (Precedence Diagramming Method -1977 ) The Science of Scheduling as defined by Critical Path Analysis “CPA” celebrated its 50th Anniversary in 2007.
  6. 6.  The term Schedule means  Arrange or plan (an event) to take place at a particular time.  Make arrangements for (someone or something) to do something.
  7. 7.  Work Breakdown Structure  Work Package  Decomposition  Rolling Wave Planning  Schedule Compression ◦ Crashing ◦ Fast Tracking
  8. 8.  Resource Leveling  Bottom-up Estimating  Project Network Diagram  PERT (Program Evaluation and Review Technique)
  9. 9.  According to Project Management Institute, The Following is the process from Start to End in order to create a Project Schedule  Activity Definition  Activity Sequencing  Activity Resource Estimating  Activity Duration Estimating  Schedule Development  Schedule Control
  10. 10.  Activity Definition is a process of defining the Activities which are part of scope of work in order to complete the Project  We drive the following things after Activity Definition process ◦ Activity List ◦ Activity Attributes ◦ Milestone List
  11. 11.  For Activity Sequencing , different Techniques can be used which are ◦ Precedence Diagramming Method (AON) ◦ Activities can have four types of dependencies under this method which are  Finish to Start  Start to Start  Start to Finish  Finish to Finish
  12. 12. ◦ Arrow Diagramming Method ◦ Activities can have one type of dependency under this method which is  Finish to Start
  13. 13.  Durations in Project Network Diagram are calculated by using the following  Early Start  Early Finish  Late Start  Late Finish  Forward Pass Calculation  Backward Pass Calculation
  14. 14.  Activity Resource Estimation is a process where the resources (physical, human, infrastructure) are determined  Top down or  Bottom up  Estimation
  15. 15.  Activity Duration Estimation is a process where the duration against each Activity is calculated.  Following Techniques can be used to calculated Duration for activity ◦ Analogous Estimating ◦ Parametric Estimating ◦ Three Point Estimate or PERT Estimate  Reserve Analysis
  16. 16.  PERT Estimation uses the following concept
  17. 17. ◦ Following are some methods to develop the Project Schedule ◦ Project Network Diagram Method ◦ Critical Path Method, longest path in project network diagram ◦ Critical Chain Method , adjusted schedule after incorporating dead lines and resources constraints in critical path method
  18. 18.  Suppose we have a project with Following Activities  Start  Requirement Analysis -TASK 1 – 3 Days  Development - TASK 2 – 10 Days  Installation - TASK 3 - 6 Days  Deployment - TASK 4 - 8 Days  UAT - TASK 5 - 4 Days  Close
  19. 19.  Second Step would be to find the dependencies among activities and draw a network diagram  Lets say we have only Finish to Start Relationship between activities as under  Start-TASK 1-TASK 2- TASK 5-End  Start –TASK 1-TASK3-TASK4-TASK5-End
  20. 20.  Let us Calculate Early Start and Early Finish of Theses Tasks by Forward Pass.
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