Operations Champions Set 2: Q 1 of 25
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Question No. 1 of 25
The first known tool of this type was developed in 1896 by Karol Adamiecki, who called it a harmonogram. One of the first major applications of it was during World War I.

On the initiative of General William Crozier, then Chief of Ordnance these included that of the Emergency Fleet, the Shipping Board, etc. Today it has 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 all over the world.