In this study, work and time studies were carried out to be found the productivity of power-saws using in harvesting which is made according to assortment method. The effectual factors on productivity at working with power-saw, feliing damage to surroundings trees and factors on feliing damage level have been brought out. At the end of work-time studies and analysis, mean productivity value at working with power-saw has been estimated. Operation phases most effective on total time were determined as feliing and bucking. The factors most important on total time have been determined as timber amount of feliing tree and volume of stern.