What is the VCA method? Thank god, help me.

Value chain analysis (coordination mechanism of the relationship between value companies. Value chain analysis regards enterprises as a series of input, transformation and output activities, and each activity may produce value-added behavior relative to the final product, thus enhancing the competitive position of enterprises. The optimization of information technology and key business processes is the key to realize enterprise strategy. Enterprises can improve their competitiveness by flexibly applying information technology in the value chain process and giving full play to the enabling, leverage and multiplier effects of information technology.