Gantt, Henry

A Gantt chart is a horizontal bar chart that graphically displays the time relationship of the steps in a project. It is named after Henry Gantt, the industrial engineer who introduced the procedure in the early 1900s. A line placed on the chart in the time period when it is to be undertaken represents each step of a project. When completed, the Gantt chart shows the flow of activities in sequence as well as those that can be under way at the same time. 

For some devices (resources) one wishes to know their future allocation at any point in time over a given time interval (planning horizon). For this purpose one can use a resource allocation list that lists all operations from process orders that use the resource. The resource allocation list is visualized by bar graphs (Gantt chart, original version defined around from 1900 by Henry Laurence Gantt). 

A special type of bar chart used for providing a visual representation of the schedule of a project, bears the name of the inventor Henry L Gantt, hence Gantt Charts. In these charts the time frame of the project is represented on the horizontal axis in columns of days, months or years, whichever is appropriate, and the vertical axis has rows listing the tasks to be done during the project. Against each task a bar is drawn covering its duration. 

Scheduling theory and application was pioneered by Henry Gantt at the beginning of the twentieth century who developed the famous Gantt charts during the First World War. Gantt s developments were followed by the findings of Smith, Johnson, and Jackson (Ixe et al. 1997 Pinedo 2008 Potts and Strusevich 2009). 

The Gantt chart was invented by Henry Gantt in the early part of the last century. Gantt charts coordinate various activities (with a common ultimate goal) of various people. Such charts are the predecessor of the most powerful methods of the Critical Path Method (CPM) and Program Evaluation and Review Technique (PERT). 

The first known tool of this type was reportedly developed in 1896 by Karol Adamiecki, who called it a harmonogram. Adamiecki did not publish his chart until 1931, however, and then only in Polish (Wikipedia 2011a). The chart is named after Henry L. Gantt, an American mechanical engineer and... 

Wikipedia. 2011b. Henry Gantt. (http //en.wikipedia.org/wiki/Henry Gantt), May 9. 

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