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Elfctric Storagr Battery Co.. Philadelphia, "Exide-Ironclad Topics," May 1Q33.

A. Study of the Time Spent Delivering Milk on Seven Different Routes.

The purpose of this chart is to compare the length of time spent delivering milk by horsewagon with the time spent delivering milk by electric truck.

■I IDLE CD Townrw Omtuoat gg -powiMS Uomtch ^^ Running uoht g^TXniNO Wattw FxICoauw W. C Brinton. "Graphic Methods," McGraw-Hill, 1914.

B. Operations of Three Tug-boats in New York for Twenty-four Hours. The

Boat Represented by the Lower Bar is in Service for a Twelve-Hour Shift Only

.\ morkinK rhart nf this kind wotiKl iisuully Ixina<lo on a lory? strip of co-onlinalc paper. The illustration na.s <lniwn rnlin-ly \>y hnml lo show the possibilities of han<l cross-hatching for bringing out information ordinarily shown in several colors

Chapter 32 PROGRESS CHARTS

l3 ynonyms for progress charts as used in this chapter are schedule charts, Gantt charts, procedure charts, process charts, production control charts.

REFERENCES

Clark, Wallace, The Gantt Chart. A Working Tool of Management, The Ronald Press Co., New York City, 1922.

Gantt, H. L., "Organizing for Work," Industrial Management, Vol. LVIII, August 1919 (Now Factory Management and Maintenance).