Gantt chart showing three kinds of schedule dependencies (in red) and percent complete indications. A Gantt chart is a popular 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 (also called "TIME NOW" or "DATA DATE"), as shown here. Image File history File links Size of this preview: 800 × 532 pixelsFull resolution (896 × 596 pixel, file size: 26 KB, MIME type: image/png) Created by Garry L. Booker. ...
Image File history File links Size of this preview: 800 × 532 pixelsFull resolution (896 × 596 pixel, file size: 26 KB, MIME type: image/png) Created by Garry L. Booker. ...
A bar chart is a chart with rectangular bars of lengths usually proportional to the magnitudes or frequencies of what they represent. ...
In project management, a schedule consists of a list of a projects terminal elements with intended start and finish dates. ...
In project management, a terminal element is the lowest element (activity or deliverable) in a work breakdown structure(WCS); it is not further subdivided. ...
A project is a temporary endeavor undertaken to create a unique product or service[1]. // The word project comes from the Latin word projectum from projicere, to throw something forwards which in turn comes from pro-, which denotes something that precedes the action of the next part of the word...
// One of the most important WBS design principles is called the 100% Rule. ...
In a project network, a dependency is a link amongst a projects terminal elements. ...
Historical development
The first Gantt Chart was actually developed by Karol Adamiecki, under the name Harmonogram. As Adamiecki did not publish his chart until 1931, this famous chart bears Gantt's name.[citation needed] Henry Gantt (1861-1919) designed his chart in 1910 (see "Work, Wages and Profit" by H. L. Gantt, published by The Engineering Magazine, NY, 1910; republished as Gantt, H. L. (1974). Work, wages, and profits. Easton [Pa.]: Hive Pub. Co. ISBN 0879600489). Karol Adamiecki (b. ...
Henry Laurence Gantt, A.B.; M.E. (1861-1919) was a mechanical engineer and management consultant who is most famous for developing the Gantt chart in the 1910s. ...
Year 1910 (MCMX) was a common year starting on Saturday (link will display calendar) of the Gregorian calendar (or a common year starting on Friday [1] of the 13-day-slower Julian calendar). ...
NY redirects here. ...
In the 1980s, personal computers eased the creation and editing of elaborate Gantt charts. These desktop applications were primarily intended for project managers and project schedulers. In the late 1990s and early 2000s, Gantt charts became a common feature of web-based applications, including collaborative groupware. Collaborative software, also known as groupware, is application software that integrates work on a single project by several concurrent users at separated workstations (see also Computer supported cooperative work). ...
Although now considered a common charting technique, Gantt charts were considered quite revolutionary at the time they were introduced. In recognition of Henry Gantt's contributions, the Henry Laurence Gantt Medal is awarded for distinguished achievement in management and service to the community. The Henry Laurence Gantt Medal was established in 1929 by the American Society of Mechanical Engineers for distinguished achievement in management and service to the community. ...
Advantages and limitations 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. // One of the most important WBS design principles is called the 100% Rule. ...
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. This practice makes it very difficult to follow the 100% Rule. Instead the WBS should be fully defined to follow the 100% Rule, then the project schedule can be designed. // One of the most important WBS design principles is called the 100% Rule. ...
// One of the most important WBS design principles is called the 100% Rule. ...
Although a Gantt chart is easily comprehended for small projects that fit on a single sheet or screen, they can become quite unwieldy for projects with more than about 30 activities. Larger Gantt charts may not be suitable for most computer displays. A related criticism is that Gantt charts communicate relatively little information per unit area of display. That is, projects are often considerably more complex than can be communicated effectively with a Gantt chart.
Gantt charts only represent part of the triple constraints 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. Project Management is the discipline of organizing and managing resources (e. ...
Although project management software can show schedule dependencies as lines between activities, displaying a large number of dependencies may result in a cluttered or unreadable chart.
Because the horizontal bars of a Gantt chart have a fixed height, they can misrepresent the time-phased workload (resource requirements) of a project. In the example shown in this article, Activities E and G appear to be the same size, but in reality they may be orders of magnitude different. A related criticism is that all activities of a Gantt chart show planned workload as constant. In practice, many activities (especially summary elements) have front-loaded or back-loaded work plans, so a Gantt chart with percent-complete shading may actually miscommunicate the true schedule performance status.
See also The following is a list of project management software. ...
Henry Laurence Gantt, A.B.; M.E. (1861-1919) was a mechanical engineer and management consultant who is most famous for developing the Gantt chart in the 1910s. ...
PERT network chart for a seven-month project with five milestones (10 through 50) and six activities (A through F). ...
External links - Create a Gantt chart in Excel
- Easy Way of Creating Gantt Charts in Excel using Condition Formating & Other Tools Evaluation
- Long-running discussion regarding limitations of the Gantt chart format, and alternatives, on Edward Tufte's website
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