Production Equations for Grapple Yarding in Coastal British Columbia

Abstract

Abstract An elemental time study was designed and used in a comprehensive investigation of grapple yarding productivity in coastal British Columbia. Data were collected using hand-held computers and processed through a series of editing and auditing programs prior to analysis. A comprehensive statistical analysis was applied to the data including fitting regression equations, stratification and hypothesis testing. The findings include a library of production equations suitable for estimating productive and total cycle times for a wide range of machines and operating conditions. West. J. Appl. For. 6(1):7-10.