Lecture No.3 - Gantt Chart

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Construction Management Using Gantt Chart

Transcript of Lecture No.3 - Gantt Chart

  • Project Management

    Gantt Charts

  • Pre-Assessment

    Who has heard of a Gantt Chart?

    Who would like to explain what a Gantt chart is?

    Who has used a chart to help organize a project?

  • Why should I care?

    Gantt charts can help with lifes projects

    Remodeling a bathroom

    Building a deck

    Organizing a wedding

    Cooking

    Group Projects

  • Think about a group project you have done

    How did it go?

    Was it easy to split up tasks?

    Did you have timelines?

    Was it easy to co-ordinate the tasks?

    Was it easy to express what needed to be done and when?

    Did you use any techniques that helped?

    Wish there was a better way?

  • Why should I care (cont.)

    Used by project managers

    Construction Managers

    Excellent employment opportunities

    Projected employment 487,000 in 2006, 564,00 in 2016

    Increase of 77,00 in next 10 years

    Median Salary Building equipment contractors $75,200 (Php3.1M/yr)

    Electrical contractors $74,380 (Php3.1M/yr)

    Residential building construction $69,400 (Php2.9M/yr)

  • Why Should I Care (cont.)

    Engineering and Natural Science Managers

    Job growth about as fast as average

    Median Salary

    R&D in the physical, engineering and life sciences $120,000

    Pharmaceutical and medicine manufacturing $111,070

    Architectural, engineering and related services $88,990

  • Expectations

    Understand that a Gantt chart is a useful tool for planning and scheduling projects

    Should be able to read and produce a Gantt chart

  • Gantt Chart Overview (cont.)

    What does it look like?

  • The Good, the Bad and the Ugly

    Advantages Planning and scheduling Allows you to assess how long a project should take

    Lays out the order in which tasks need to be carried out

    Helps manage the dependencies between tasks

    Monitoring a project Allows you to immediately see what should have been

    achieved at a point in time

    Shows how remedial action may bring the project back on course

  • Advantages and Disadvantages (cont.)

    Shortcomings

    Quite unwieldy for project with more than about 30 activities

    Does not represent the size of a project or the relative size of work elements

  • History of the Gantt Chart Created by Laurence Gantt (1861-1919) in

    1910 Mechanical engineer, management consultant

    and industry advisor

    Used as a visual tool to show scheduled and actual progress of projects

    Accepted as commonplace today but was an innovation of world wide importance

    Used on large construction projects Hoover Dam in 1931 Interstate highway network in 1956

  • Evolution of the Gantt Chart

    Basic Gantt Chart (1918)

  • Evolution (cont.)

    fill in the bar method to show project completion

  • Sequential and Parallel Activities

    Sequential, also called Linear

    Activities that are dependent on other activities being completed first

    Ex: Must design before build

    Must preheat oven before inserting pizza

    Parallel, also called Nondependent

    Not dependent on completion of any other task

    May be done at any time before or after a particular stage is reached

  • Steps for Creating a Gantt Chart

    1. List all activities in the plan

    2. Head up graph paper with the days or weeks through to task completion

    3. Plot the tasks onto the graph paper

    4. Schedule activities

    5. Presenting the analysis

  • Steps for Creating a Gantt Chart

    1. List all activities in the plan

    earliest start date

    estimated length of time it will take

    Whether it is parallel or sequential

    If sequential show which tasks they depend on

  • List All Activities Example Task Possible Start Length Type Dependent

    on

    1. High level analysis

    week 1 5 days Sequential

    2. Selection of hardware platform

    Week1 1 day Sequential 1

    3. Install and commission hardware

    Week3 2 weeks Parallel 2

    4.Detailed analysis of core modules

    Week1 2 weeks Sequential 1

    5. Detailed analysis of supporting utilities

    Week1 2weeks Sequential 4

  • Steps (cont.)

    2. Head up graph paper with the days or weeks through to completion

    3. Plot the tasks onto the graph paper

    Draw a rough draft

  • Steps (cont.)

    4. Schedule Activities

    Schedule activities so that sequential actions are carried out in the required sequence

    Where possible, schedule parallel tasks so that they do not interfere with sequential actions

    Allow some slack time for holdups, overruns

  • Steps (cont.)

    5. Presenting the analysis

    Prepare final version

  • Checking for Understanding

    What are some reasons to use a Gantt chart (benefits of using)?

    What are some projects where you might use a Gantt chart?

    What is the difference between a dependent and independent task?

    Give an example

  • Checking for Understanding (cont.) It is day 5

    What are they behind schedule on?

    What are they ahead of schedule on?

    Based from Report

    Date 11/26/2013:

    Activity WRITE

    REPORT is behind

    schedule.

    Activity

    EVALUATION is

    ahead of schedule.