Gantt chart

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Gantt chart

[′gant ‚chärt]
(industrial engineering)
In production planning and control, a type of bar chart depicting the work planned and done in relation to time; each division of space represents both a time interval and the amount of work to be done during that interval.

Gantt chart

A graphic device that depicts tasks, machines, personnel, or whatever resources are required to accomplish a job on a calendar-oriented grid. Charts may be provided for various managerial levels and responsibilities, but detailed planning occurs at the lowest organizational level. Performance may be monitored and controlled throughout the organization.

The Gantt chart is an effective tool for planning and scheduling operations involving a minimum of dependencies and interrelationships among the activities. The technique is best applied to activities for which time durations are not difficult to estimate, since there is no provision for treatment of uncertainty. On the other hand, the charts are easy to construct and understand, even though they may contain a great amount of information. In general, the charts are easily maintained provided the task requirements are somewhat static.

An initial step in development of a Gantt chart may be to specify the tasks or activities making up a project, as shown in the illustration. The amount of time required for each activity is represented as a horizontal bar on the chart, with open triangles designating original start and finish dates in this example. The open start triangle is changed to a filled triangle upon inauguration of the activity, and the bar is filled in with vertical lines to indicate progress and completion. The open finish triangle is also filled upon completion. Slippage times are documented on the chart by broken lines, and the diamond symbols are employed to indicate rescheduled work. The vertical line on the chart is the current-date indicator and indicates present and future status of the project as of that date.

Example of a Gantt bar chartenlarge picture
Example of a Gantt bar chart

Updating of a Gantt chart will reveal difficulties encountered in the conduct of a project. Possible solutions include rescheduling, overtime, multishift operations, use of additional equipment and facilities, and changes in method.

An outgrowth of the bar chart technique is the milestone chart. A milestone is an important activity in the sequence of project completion. The most significant activities may be designated major milestones. The primary difference in this concept is the graphic display, since the method and collection of data are the same. The milestone approach offers no intrinsic improvement over the basic Gantt chart but provides a means for focusing resources on critical items. See PERT

Gantt chart

A type of floating bar chart usually used in project management to show resources or tasks over time.
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In addition to editing tasks, you can interactively make assignments, add follow-up notes to individual tasks, and switch to the Gantt Chart view where you can schedule tasks and log completed tasks.
She worked on massive projects, such as the step-by-step construction of aircraft, and used the Gantt chart, a well-known project-planning tool that reveals at a glance whether tasks are on schedule.
Gantt charts are used in planning projects to show the proposed start and finish of each activity graphically against a common timetable.
As a result, the newest Gantt chart showed almost total concurrency for all development phases and substantial schedule compression within each phase.
With it you can create flowcharts, organization charts, networks, floor plans, Gantt charts, calendars, timelines, and a variety of technical diagrams.
ILOG visualization technology provides some of the most advanced data display components in the world, including Gantt charts, schedule displays, real time charts, workflow monitors, network maps, and optimization analysis displays.
The main risk of using Gantt charts to calculate the DDD period is that the results have no scientific credibility.
Gantt charts are bar graphs that help plan and monitor project development or resource allocation on a horizontal time scale.
Also available are Gantt charts, pie charts, bar graphs, and ISO 9000 method worksheets.
Gantt Charts have been applied to all kinds of projects to illustrate how scheduling may be best achieved.
The user inter-face, a Java applet, gives users access to features like threaded discussions, chat, paging and a whiteboard, voting and surveys, team news and events, contact management, calendaring, project scheduling, task management, Gantt charts, and more.
Up to now, Gantt charts have been painstakingly rendered to GIF images for use on the web," says Tom Nalevanko, president of Mainstay.