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Gantt Chart. History of the Gantt Chart.

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History of the gantt chart
History of the Gantt Chart

Henry L Gantt, an American engineer in 1917, developed a horizontal bar chart used as a production control tool. The Gantt chart provides a graphical illustration of activities to be completed according to a specific time schedule. On the left side of the chart is a list of activities. Along the top is the time frame during which each activity is to be completed.


Sequential and parallel tasks
Sequential and Parallel Tasks

  • Project planning organizes tasks

  • Task types:

    • Sequential or linear

      • Task dependent on completion of another task

    • Nondependent or parallel

      • Task not dependent on completion of any other tasks

      • Tasks may be done at any time before or after a particular stage is reached



Gantt chart example
Gantt Chart Example

What tasks are needed to build a house?

In what order do the tasks need to be performed?

Can any tasks be performed at the same time as another task?



Gantt chart house construction1
Gantt Chart: House Construction

Foundation work starts as site is cleared

Foundation

Ground


Gantt chart house construction2
Gantt Chart: House Construction

Floors can start after

Foundation is completed

Floor

Foundation

Ground


Gantt chart house construction3
Gantt Chart: House Construction

Walls

Landscape

Floor

Foundation

Ground


Gantt chart house construction4
Gantt Chart: House Construction

Roof

Roof is partially constructed as walls are being built

Walls

Floor

Foundation

Ground


Gantt chart house construction5
Gantt Chart: House Construction

Roof

Siding started once walls are complete and while roof is being built

Siding

Walls

Floor

Foundation

Ground


Gantt chart house construction6
Gantt Chart: House Construction

Roof

All tasks are complete

Siding

Walls

Landscape

Floor

Foundation

Ground