Project portfolio configuration (PPC) is an important approach to maintain the sustainable 12 development of enterprises and achieve organizations' strategy. However, the synergetic efficacy 13of PPC which determines the degree of the project's strategic objectives achieved is a fuzzy problem 14 and hard to be measured. To solve this problem, this paper takes the data envelopment analysis 15(DEA) as the tool to measure the efficacy of PPC under deterministic conditions. First, a portfolio 26