Bookkeeping and cost accounting for factories . dicatingthe normal percentags of full capacity which each machineor department is expected to run during a month of goodbusiness. In the chart shown, Fig. 3, doubling might havesuch a line at 70 per cent and twisting at 75 per cent, showingthe excess idleness of doubling to be 22 per cent as comparedwith 52 per cent total idleness, and the excess idleness oftwisting 22 per cent as compared with the 47 per cent shownon the chart. The most important function of Mr. Gantts idleness chartis not that it is a historical record of what happened duringth
Bookkeeping and cost accounting for factories . dicatingthe normal percentags of full capacity which each machineor department is expected to run during a month of goodbusiness. In the chart shown, Fig. 3, doubling might havesuch a line at 70 per cent and twisting at 75 per cent, showingthe excess idleness of doubling to be 22 per cent as comparedwith 52 per cent total idleness, and the excess idleness oftwisting 22 per cent as compared with the 47 per cent shownon the chart. The most important function of Mr. Gantts idleness chartis not that it is a historical record of what happened duringthe past month, not a mere statement of what was the cost ofidleness in that and in preceding months: it is that it is anexhibit of inefficiency which will stimulate the managersof the business to action. It leads to investigation ofthe causes of idleness and to the finding of methods toremedy it. IRON WORKS STATISTICS-GRAPHICAL PRESENTATION The accompanying table and chart, Fig. 4, taken from apaper on A Decade of Progress in Reducing Costs, by. Fig. 4.—Ikon Works Kirchhoff (Trans. Am. Inst. Mining Engrs., 1S99),show the relative percentages of the several items enteringinto the cost of a ton of pig iron, taking the costs in the year1S99, a year of high profits, at 100 per cent. The method ofpresentation is one that may be found useful in many indus-tries. The chart, which is made by plotting the figures ofthe table, shows the fluctuations and general tendencies ofcosts much more clearly than do the figures themselves. DAILY AND MONTHLY RECORDS. CHARTING OF STATISTICS. COST OF IDLENESS 107 FlOCRE FLUCTUATIONS IN COST OF PRODUCTION OP PlQ IRON.—SOUTHERN PLANT Comparative Statement of Pig-iron Costa for the Year 1839 to 1898, both Inclusive, with the Figures of 18S9 taken as a Unit Basis Product Coke Con- Ore Cost, Limestone Coke Cost, Labor Cost, Cost of Cost of Total Cost. Average Net Year per Day, sumption Per Cent Cost, Per Cent Per Cent Arbitraries, Sundr
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