3. Truck and Driver Requirements — The daily schedule of deliv- 

 ery orders for each band and the three technical input-output relation- 

 ships for determining the time required to make a trip provides the 

 means for deriving the number of trucks, drivers, man-hours, and miles 

 of travel for each firm at each production density level. In all instances 

 the number of drivers is the same as the number of trucks. These re- 

 quirements are developed on a daily basis, but are readily convertible to 

 an annual basis since the roster is typical for every day of operations. 

 The relationships are assumed to hold over any given time period. 



The requirements are calculated with the objective of maximizing 

 the tons hauled per trip and the number of trips by each truck and 

 driver in the allowed ten-hour work day. 



The number of trips and tons delivered a day by a truck and driver 

 of a given firm depends on the distance between the mill and the aver- 

 age location of units in the bands, or the production density. As density 

 is increased, the mileage and travel time between origin and destinations 

 is reduced, allowing a truck to make more trips. Thus a firm with a given 

 volume to distribute is able to reduce the number of trucks and drivers. 

 However, as firm size and volume is increased with density constant, the 

 added trips increase in length and travel time, thereby reducing the 

 average number of trips and tons hauled per day per truck. 



The requirements of each firm at each density level are summarized 

 in Table 15. At the lowest density level considered, 1.31 tons distributed 

 per square mile per year, with the 10-hour work day restriction on the 

 use of trucks and drivers, it is not possible for firm F to distribute into 

 Band VI, thus making the entire operation of firm F an impossibility. 

 Most of the trucks and drivers can complete only one or two trips and 

 average between 200 and 280 miles a day. The tonnage distributed per 

 truck varies between 12.4 and 20.9 a day. 



Increasing density from 1.31 to 6.55 tons distributed per square mile 

 per year allows all six firms to operate and reduces the number of trucks 

 and drivers needed for all firms except Firm A. Trucks and drivers can 

 complete from two to three trips and average between 84 and 235 miles 

 a day. Each truck delivers from 20.4 to 25.1 tons a day. 



At the highest density level considered, 32.73 tons per square mile 

 per year, trucks and drivers are further reduced in number. At this den- 

 sity level, trucks and drivers complete from three to four trips and travel 

 from 37 to 156 miles a day. Each truck delivers from 20.9 to 34.8 tons 

 a day. 



Investment 



Trucks are the largest investment item for the feed distribution firm. 

 However, additional investment is needed for a garage in which to 

 house the trucks, office space for the administrative personnel, and office 

 equipment. 



1. Truck — The type of bulk delivery truck considered here has a 

 cost of $19,500. The tandem-axle, heavy-duty chassis costs $13,000, and 

 the bulk feed tank with the pneumatic unloading equipment costs $6,500. 

 These prices include all the extra equipment required by safety rules 

 and regulations. 



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