perter,please answer?

Answer 1

You mean Porter?

The Porter 5 forces analysis is a framework for business management developed by Michael Porter in 1979. It uses concepts developed in Industrial Organization (IO) economics to derive 5 forces that determine the attractiveness of a market. It is also known as FFF (Fullerton's Five Forces). Porter referred to these forces as the microenvironment, to contrast it with the more general term macroenvironment. They consist of those forces close to a company that affect its ability to serve its customers and make a profit. A change in any of the forces normally requires a company to re-assess the marketplace.