Abstract: The framework of SWOT is improved and extended, strategic vectors including strategic orientationangle and strategic intensityare instituted in the polar coordinate system, so that SWOT framework can effectively depict enterprise competitive posture and market status, which provide an operational platform for the strategic design and implement. Finally, the scientific researchdevelopment stratagem of a well-known petroleum enterprise is brought out to demonstrate above approachand method. 16Refs In Chinese  

Key words: SWOT, quantitative analysis, strategic vector, polar coordinate system