The quantified equations of the core factors , such as project attainability , project resource quantum and the organizing capability for research and development are given . based on the basic distribution and depiction form of the research and development projects , contraposing the adaptability between project scale and the economic organization of research and development , the concept of “ economical adaptability ” are proposed and its 在分析研发项目的基本分布和描述形式的基础上,从经济获利情况的角度,针对研发型经济组织与研发项目规模的适应性,提出了经济适应度的概念并进行了数学上的定义,指出研发组织的经济适应度决定了研发组织承担研发项目的意愿。