Catalogued

Range (floating bar) chart

Made by: No single inventor documented; classified by Calvin F. Schmid
Year: 1954
Field: Management and industry
Kind: Data display
Room: How a group spreads — Placed by reading its description, not yet studiedCould also hang in: Change over time

Skeleton drawing, not the original plate

4 other forms share this skeleton

Source

Attribution less certain: contested, or no single inventor recorded