Gantt Chart

1. Gantt Chart Engineering Design Development. Turner College and Career High School

2. Vocabulary • Work breakdown structure (project management) A work breakdown structure (WBS), in project management and systems engineering, is a deliverable oriented decomposition of a project into smaller components. • A work breakdown structure element may be a product, data, service, or any combination thereof. A WBS also provides the necessary framework for detailed cost estimating and control along with providing guidance for schedule development and control

3. Vocabulary • Schedule (project management) a schedule is a listing of a project's milestones, activities, and deliverables, usually with intended start and finish dates. Those items are often estimated in terms of resource allocation, budget and duration, linked by dependencies and scheduled events. A schedule is commonly used in project planning and project portfolio management parts of project management. Elements on a schedule may be closely related to the Work Breakdown Structure (WBS) terminal elements, the Statement of work, or a Contract Data Requirements List.

4. Vocabulary • Milestone (project management) a milestone is an event that receives special attention. It is often put at the end of a stage to mark the completion of a work package or phase. Milestones can be put before the end of a phase so that corrective actions can be taken, if problems arise, and the deliverable can be completed on time. • In addition to signaling the completion of a key deliverable, a milestone may also signify an important decision or the derivation of a critical piece of information, which outlines or affects the future of a project. In this sense, a milestone not only signifies distance traveled (key stages in a project) but also indicates direction of travel since key decisions made at milestones may alter the route through the project plan.

5. Vocabulary • Task (project management) a task is an activity that needs to be accomplished within a defined period of time or by a deadline. A task can be broken down into assignments which should also have a defined start and end date or a deadline for completion. One or more assignments on a task puts the task under execution. Completion of all assignments on a specific task normally renders the task completed. Tasks can be linked together to create dependencies.

6. Vocabulary • Deliverable (project management) is a term used in project management to describe a tangible or intangible object produced as a result of the project that is intended to be delivered to a customer (either internal or external.Adeliverable could be a report, a document, a server upgrade or any other building block of an overall project.

7. The Approach • Phase I • Break project into operations necessary for completion • Determine sequential relationship of operations • Every operation must have event to mark commencement – • i.e. completion of preceding operation • Can operations overlap?

8. The Approach • Phase II • Create time estimates for each operation • Determine earliest possible start date, earliest possible • finish date , latest start & finish • Determine “free float” and “total float” • Revised after completion of Phase III

9. The Approach • 􀂅 Phase III • 􀂆 Establish time-cost relationship • 􀂆 Establish scheduling variations • 􀂄 Determine most favorable balance between time-cost • 􀂆 Normal Start – normal time, least cost • 􀂆 All-Crash Start – least time, higher cost

10. The Approach • 􀂅 Phase III • 􀂆 Establish time-cost relationship • 􀂆 Establish scheduling variations • 􀂄 Determine most favorable balance between time-cost • 􀂆 Normal Start – normal time, least cost • 􀂆 All-Crash Start – least time, higher cost

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16. Gantt Chart • A Gantt chart is a type of bar chart that illustrates a project schedule. Gantt charts illustrate the start and finish dates of the terminal elements and summary elements of a project. Terminal elements and summary elements comprise the work breakdown structure of the project. Some Gantt charts also show the dependency (i.e. precedence network) relationships between activities. Gantt charts can be used to show current schedule status using percent-complete shadings and a vertical "TODAY" line as shown here.

17. Gantt Chart • Although now regarded as a common charting technique, Gantt charts were considered revolutionary when they were introduced. In recognition of Henry Gantt's contributions, the Henry Laurence Gantt Medal is awarded for distinguished achievement in management and in community service. This chart is used also in Information Technology to represent data that has been collected.

18. Gantt Chart • Gantt charts have become a common technique for representing the phases and activities of a project work breakdown structure (WBS), so they can be understood by a wide audience. • A common error made by those who equate Gantt chart design with project design is that they attempt to define the project work breakdown structure at the same time that they define schedule activities.

19. Gantt Chart • Gantt charts only represent part of the triple constraints (cost, time and scope) of projects, because they focus primarily on schedule management. Moreover, Gantt charts do not represent the size of a project or the relative size of work elements, therefore the magnitude of a behind-schedule condition is easily miscommunicated. If two projects are the same number of days behind schedule, the larger project has a larger impact on resource utilization, yet the Gantt does not represent this difference.