| Large-scale contractor(LSC) is the most important part of construction industry. Its sustainable development is of great importance to the construction industry and the national economy. Now it is falling into the paradox of development: its scale expands quickly, but its benefits grow slowly or decrease. So it is of great significance about how to promote its health and sustainable development. Based on the development of the theory of the core-competence,especially the strategic capability, this paper deepenes the research on the strategic capability (SC). Combining with the maturity model, the maturity model of SC, which is applied to the practice of large-scale contractors'development, is developed. A lot of methodologies are used in this research such as theoretical analysis and case study, quantitative and qualitative analysis and so on. Considering the actual demands and characters of LSC, its maturity model is studied in detail as follows:Based on the development of the theory of the core-competence especially the strategic capability, this paper deepens the research on the strategic capability (SC). The concept of SC and its character are defined. The concept of enterprise efficiency and the relation between internal efficiency and external efficiency are analyzed. The relation between SC and internal efficiency of enterprise and external efficiency is discussed. It is pointed out that SC can be measured by enterprise efficiency. The two dimensional maturity model of SC is put forward when maturity model is applied to SC. It is suggested that the maturity model of SC is divided into internal and external maturity model. Then the general process is given.The method of Malmquist productivity index is applied to research on the Total Factor Productivity (TFP) of LSC from the year 1996-2005. The result shows that the change of TFP is due to the change of technical efficiency and technology progress. Then the value of GDP, investment on fixed assets and the construction industry is forecasted based on the method of GM(1,1) and regression analysis. The influences on LSC are analyzed caused by the change of key competitive factors of projects. At last, the structure of capabilities of LSC is analyzed.The connotation and grade of internal maturity model of SC of LSC are defined, also the key practice and its connotation of each grade. The classification principles of internal maturity model of SC of LSC are confirmed. The efficiency of listed LSC from the year 2003-2006 is evaluated based on the method DEA and the grade of internal maturity is determined according to the results. Then, the corresponding measures are proposed to improve the internal maturity of SC of LSC.The connotation and grade of external maturity of SC of LSC are defined, also the key practice and its connotation of each grade. It is pointed out that scope economy and scale economy could be regarded as the principles to evaluate the grade of external maturity of SC of LSC. Then, scale economy of LSC is evaluated based on the model of BCC. The relation is measured between diversification extent of LSC and its performance based on Herfindahl index, also the relation between diversification mode of LSC and its performance based on LRUH model. The results of these can be used to be the evaluation principle of scope economy. According to the evaluation results, the external maturity grade of SC of these listed LSC is finally determined. Then, some corresponding measures are put forward to improve the external maturity of SC.Using the method which is put forward in this paper, the current problems in the development of Shanghai Tunnel Engineering Corporate are analyzed, then the grade of its internal and external maturity of SC is evaluated respectively by which the exact position in the two-dimensional matrix is determined. According to the results, some corresponding measures are put forward to improve the maturity of SC of Shanghai Tunnel Engineering Corporate.Researching on relative theory and methods of maturity of SC of LSC are of advantages to enrich and supplement the competence-based theory to some extent, to improve the development of construction economics and management theory, to resolve the problems in the China's LSC and promote its healthy and sustainable development.
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