On-site productivity evaluation through productivity achievement ratio

Productivity only shows actual achievement without any regards to obtainable productivity. Therefore, productivity and change in its values do not provide adequate information for the management of construction productivity. This study aims to develop a productivity evaluation indicator that can consider obtainable productivity. For this purpose, this paper presents three renewed concepts of productivity transition. Based on these concepts, the study suggests Productivity Achievement Ratio (PAR) as a productivity evaluation indicator. PAR calculation is a longitudinal process conducted by multiple linear regression analysis. Because PAR includes obtainable productivity and is non-dimensional, it can be used to compare productivity management performances with different items and in different sites.