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BASIC CONSTRUCTION PLANNING TECHNIQUES

BASIC CONSTRUCTION PLANNING TECHNIQUES. Dr. Ashwin Mahalingam IIT-Madras. TOPICS TO BE COVERED. Introduction to Project Management Work Breakdown Structures Bar Charts Network Diagrams Critical Path Method Floats and Float Calculations Introduction to Microsoft Project. LECTURE 1.

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BASIC CONSTRUCTION PLANNING TECHNIQUES

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  1. BASIC CONSTRUCTION PLANNING TECHNIQUES Dr. Ashwin Mahalingam IIT-Madras

  2. TOPICS TO BE COVERED • Introduction to Project Management • Work Breakdown Structures • Bar Charts • Network Diagrams • Critical Path Method • Floats and Float Calculations • Introduction to Microsoft Project

  3. LECTURE 1

  4. Introduction to Project Management

  5. Projects Vs. Processes Projects Processes REPETITIVE CONTINUOUS INTEGRATED LEARNING ORIENTED • UNIQUE • FIXED BEGINNING AND END • FRAGMENTED • LEARNING IMPAIRED

  6. Expenditure of Funds Level of Influence The need for Project Management ConceptualDesign Detailed Design and Implementation Closeout & Learning 100% 0%

  7. Arrange the following in sequence • Resource Identification • Duration Estimation • Activity Sequencing • Activity Identification • Methodology Identification

  8. WORK BREAKDOWN STRUCTURES

  9. In order to prepare a good WBS, you need to have a good knowledge of construction practices

  10. What Activities do I consider? A WBS should be comprehensive. There should be no gaps in the job-logic WBS Engineering Activities Shop Drawings Construction of Elements Preconstruction Activities Permits Bonds Insurance Site Investigation Materials Procurement Sampling Testing Order time Mobilization Equipment Labor Resources, Formwork Project Closeout Inspection Housekeeping Documentation

  11. BAR/GANTT CHARTS

  12. Tool 1 – GANTT Charts Invented by Henry L. Gantt in 1910 and used in WW-I, Hoover Dam etc

  13. Also called Bar Charts

  14. Components of a Bar Chart • Task with a Short Descriptive title (Obtained from WBS) • Time-Scaled Bars “Compact Base Course” Jan 15 Jan 10

  15. Preparing a Gantt Chart • Obtain Activities and Durations • List activities in increasing order of start date • Bars should be time-scaled • Usually represent earliest start and finish dates • More than 100 activities makes it hard to see • Bar charts can show partial project views but entire schedule should be drawn up at the very beginning • Activities can overlap

  16. Non-Continuous Activities

  17. 3 Phases in one row?

  18. Discrete Representation

  19. Gantt Chart with more information

  20. Percentage Complete

  21. COST CURVES

  22. Disadvantages of a Gantt Chart • Can be very complex to prepare for large projects • Scheduler is often tempted to work “backwards” to make things fit • Need additional tools such as CPM • “Early front loading” is often done • Construction logic is not easily obtained as relationships are lacking

  23. What is the relationship between Activity B and C?

  24. C depends on A, not B

  25. Advantages of a Gantt Chart • Very easy to understand – especially for unskilled workers and laymen • Can be used as a good summary tool - especially at review meetings • Can be easily changed • Good for repetitive projects • Ideal for projects that simple, sequential, with low quality personnel

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