Progress display board for construction works - with vertical calendar scale for charting progress of each stage

摘要

The display board is used to chart the progress of each stage of construction of work in progress, e.g. in a ship building yard. The board has a vertical calendar scale marked along the left-hand edge and the various construction stages are displayed by vertical columns marked along the bottom horizontal edge. Pref. the columns are blocked in as the work is completed, so that the actual progress of each stage, relative to the projected progress of that stage can be seen.