Assuming that a loss occurs on all orders shown on Fig. 159 up to the size of one hundred and fifty packages per order, the number of dots to the left of the line for 150 on the horizontal scale indicates just how great the total monetary loss would be.

Curve "A" in Fig. 159 shows the percentage of orders which contain more than any specified number of packages selected on the horizontal scale of the chart. Curve "B" shows the percentage of the total packages which are found in orders containing more than any specified number of packages selected on the horizontal scale of the chart. Curve "A" indicates the amount of clerical work involved, and curve "B" shows the amount of actual labor and the amount of revenue in exactly the same manner described for Figures 157 and 158.

GRAPHIC METHODS

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• • • • • •'«L.*'k* •

Curves "A", "B" and "C" are shown in Fig. 159 only by way of proving the utihty of the pin-board method of keeping costs where there is a large variation in the size of the orders worked upon. The illustration shows these curves superimposed on the pin board only to save

space in printing.

In Fig. 160 is shown a chart which may help to make clearer the general principles used in drawing the charts seen in Fig. 157, Fig. 158 and Fig. 159. Fig. 160 shows the appearance of the curves if there are the same number of orders in each class or group and if all classes or groups are of uniform size. It makes no difference in the shape of the curves how many orders there may be if those orders are always uniformly distributed throughout the whole length of the horizontal scale of the chart.