Figure II 



Calculated Relationship Between Annual Volume and Pounds Handled 



per Man Hour of Labor in Loading Live Poultry* 



LBS. PER MAN HO UR (LIVE BASI S) 

 I — : — r — I — I I II ri) — ■■ — I — I — rr 



600 



500 



400 



300 



200 



100 



rrri m ■ — i 1 — i i i i 1 1 1 ■ — i 1 — i i i i i n — i 1 — i i i i 1 1 



Log r = -108768 +.96ri7logx- 05906 log x' . 



Log /- 6.03260 - L68393 logX +.18070 logx ^ - 



-Logy=2.3ZI2l-.70293logX +.13936 logx 



I I I I I I I : 1 1 1 I I I I I I : I 1 1 I [ I 1 M : 1 1 ' I I I I I 



t»w*uiNr rou.^uiNr i«w*.yiN-~ row.^tn.-^- rsj 



o o o o o o S o o o o o g o b o b o o p 



o ooooog §g§§§§ § 



ANNUAL VOLUME ASSEMBLED (THOUSAND POUNDS) ag.ecoa"9/59 



Truck Costs 



Repairs and Maintenance. These costs depend basically on truck size, 

 age, miles travelled, rate of loading, and road conditions. For purposes 

 of this study road conditions were assumed to be constant and rate of 

 loading to have a negligible effect. 



As truck size increases, repair and maintenance costs increase, but not 

 in proportion to truck capacity or purchase price. Over the range of 

 truck sizes studied, capacity increases more than 150 times, but aver- 

 age costs per mile for repairs and maintenance only four times. The 

 larger (and more costly) the truck, the higher the repair bill for any 

 particular job, but the greater the "length of life," or the miles which 

 can be travelled before major overhauling becomes necessary. In these 

 calculations, for example, major overhauling was specified at 60,000 

 miles for pickup trucks and at 90.000 miles for 3-ton trucks. 



For any particular truck size, repair and maintenance costs per mile 

 tend to increase with mileage travelled at an increasing rate until it 

 becomes necessary to carry out a major overhaul or replace the motor. 

 However, time depreciation affects repair and maintenance costs. If, for 

 example, a truck travels 50,000 miles in one year, the repair bill per 



0009 ooooo 



000 



* (Excluding truck and crew travel time.) 



44 



