Page:Graphic methods for presenting facts (1914).djvu/111

 and the different areas made to stand out in contrast by the use of colored crayons. The actual differences between the two operators would show more clearly, operation by operation, if lines were used joining the ends of the components in the two bars in a manner similar to that seen in Fig. 32. The data of Fig. 85 do not lend themselves well to presentation in curve form. In Fig. 85 and in Fig. 86 the shape of the curves means nothing, since there is no numerical scale relating to the names of operations. Fig. 87 shows a much more satisfactory method for portraying the data.

Fig. 86. Record of a Detailed Time-Study of Two Operators Labeling Packages

Here the scales have been properly arranged and the two curves appear in their correct relative position on the chart. These data, however, are not well suited for curve presentation and they are more clearly brought out by the bar method used in Fig. 87

Fig. 87. Record of a Detailed Time-Study of Two Operators Labeling Packages

By this method of presentation the reader may see clearly the relative length of time for different operations as well as the comparison of total time taken by the two workers. Dimension marks and figures show conveniently the actual number of seconds required. The different operations have here been given numbers instead of names. The scale to which the chart is drawn is named

In Fig. 88 we have an application of curves to advertising in popular magazines. The curves depict the circulation of a newspaper,