Hartsog, William S., and James Cass. 



1979. Statistical analysis of balloon logging time and 

 motion data. USDA For. Serv. Res. Pap. INT-239, 15 p. 

 Intermt. For. and Range Exp. Stn. , Ogden, Utah. 



Time and motion studies were conducted on an experimental 

 balloon logging show in the Idaho Batholith during 1973. Sel- 

 ected variables were divided into three classes: those involv- 

 ing the time required for each portion of the logging cycle, 

 factors directly related to the yarding operation, and inde- 

 pendent variables. Variables were then partitioned into four 

 groups so that easy comparisons could be made between predic- 

 tive models. The resulting regression equations serve as 

 limited guidelines for predicting time requirements for the 

 various portions of the balloon logging cycle. 



KEYWORDS: logging — time and motion study, aerial logging, 

 balloon logging. 



Hartsog, William S., and James Cass. 



1979. Statistical analysis of balloon logging time and 

 motion data. USDA For. Serv. Res. Pap. INT-239, 15 p. 

 Intermt. For. and Range Exp. Stn., Ogden, Utah. 



Time and motion studies were conducted on an experimental 

 balloon logging show in the Idaho Batholith during 1973. Sel- 

 ected variables were divided into three classes: those involv- 

 ing the time required for each portion of the logging cycle, 

 factors directly related to the yarding operation, and inde- 

 pendent variables. Variables were then partitioned into four 

 groups so that easy comparisons could be made between predic- 

 tive models. The resulting regression equations serve as 

 limited guidelines for predicting time requirements for the 

 various portions of the balloon logging cycle. 



KEYWORDS: logging — time and motion study, aerial logging, 

 balloon logging. 



