关键词: 工程造价, 灰色关联分析, 关联度

Abstract: 6 factors such as land costs，the costs of drawings’design and management，the budgetary price of construction drawings，limiting time for a project，the costs of project change，the market price of labor material and machinery which affect the construction costs control are taken into consideration． According to grey correlation analysis theory，the grey relational grade of each factor and construction costs are calculated，and then the order of grey correlation degree of construction costs of all factors are also obtained． The research shows that the budgetary price of construction drawings is the greatest influential factor for construction costs． So managers should pay attention to the strategies and skills when they draw up the budgetary price of construction drawings，and then scientifically and reasonably control the factor，thus the“San Chao”phenomenon can be avoided，which means a relatively small input gains relatively more benefits．

Key words: construction costs, grey correlation analysis, correlation degree