in simplifying Fig. 14, but are not available here because of the prohibitive expense of color printing. Colored drawing inks can be obtained at almost any stationery store. A bottle of each color should be a part of the equipment of any person who is regularly doing chart work. Note in Fig. 14 the small curves drawn where one route line crosses another line. By means of small curves like these it is very easy to keep the lines separate and to show clearly that the lines crossing each other are entirely independent.
Orders and other printed forms sent through a large organization must follow a routing entirely distinct from that actually followed by the heavy materials. The routing of printed forms in a large business is, in itself, a matter worthy of most careful study to get a true understanding of their complex movements. A clear idea of office system is almost impossible unless the data are charted. Fig. 15 may give some suggestions for a chart to show the movement of printed forms through an industrial plant. Here again printing by colored inks such as would be used on the original drawing would be of great service in making the chart easy to understand and easy to follow from department to department.
If a building contains many stories the routing diagram for materials and also the routing diagram for printed forms can be made conveniently by a rough perspective drawing showing the different floors as planes one above the other. Colored ink lines on the perspective chart will show clearly the movement of materials through the manufacturing building, and will indicate the elevator movements for material in a manner not possible if the departments are represented all in one plane on the ordinary sheet of paper. Perspective charts of floors, one above the other, are so simply made that their advantage should not be overlooked when preparing routing charts for plants having multi-story buildings.
