The paper provides the overview of essential analyses and methods, helpful for enterprise architecture improvement and based on social network approach. The ideas presented in this paper focus on social network, that is built with the use of real-life manufacturing company data. It has been shown that corporate social network analysis, as a decision support system, may be influential for managing a company. Several ideas, measurements, interpretations and evaluation methods are given and discussed, in particular centrality degree, social network extraction, process management.