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Usually, processing whole project or a part of frame work delays due to acceleration, changing orders, management, characters of projects, overtime, worker crowding, early occupation in the field of construction. Through a whole project, these factors cause decreasing
construction labor-productivity which is the most dependent in business of construction. These kind of decreasing of construction labor-productivity cause many negative effects, just as extension of time, increasing cost in project of construction. Regardless of characters of construction or decreasing labor-productivity, extension of time is a incident which needs acceleration, also it cause a high possibility of claim and dispute.
The productivity has just a broad meaning in business of construction. That's why it's difficult to apply in the field of construction. Especially, factors increasing or decreasing labor-productivity is defined by analysis of working as qualitative and outlined evaluation. However, study of the each factor decreasing construction labor-productivity analysis has not researched, because of difficulty of systematic measurement and management. The existed studies about management of productivity are just focused on estimation of productivity, not on evaluation of productivity. It was true that I couldn't examine clearly about the analysis of how much important per each the factor which have influence on labor-productivity because of the characteristic as qualitative that the labor productivity have.
On this study, I tried to get the factors decreasing of labor-productivity with gathering opinions of panels of expert's studies about the factors decreasing of labor-productivity on project of construction through Delphi method and I evaluated the result factors as quantitatively and subjectively about importance of factors decreasing construction labor-productivity analysis, using AHP Method by Saaty. Also, using Delphi and AHP method, I suggest substantiated method qualitative factors are measured by quantitative criteria.