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Fig. 131. Actual Number of Accidents Occurring in Each Department of a Large Industrial Plant. Plotted Monthly by Twelve-month Averages

In this chart the actual condition in each department can be seen much more clearly than bj' the method used in Fig. 130. Here each department is judged by its own record without danger of unjust criticism based on conditions in other departments

For a more complete discussion of Figs. 130 and 131 and of the contrast of methods followed in preparing them the reader is referred to pages 142, 143 and 146

GRAPHIC METHODS

the fluctuations in the accidents of any one department over a long period of time.

As accidents never occur with any regularity, curves representing the actual number of accidents are likely to fluctuate a great deal. There was such variation in the different months for the number of accidents represented in Figs. 130 and 131 that it was almost impossible to draw any definite conclusion from curves for monthly