竞争优势来源于企业在设计、生产、营销、交货等过程及辅助过程中所进行的许多相互分离的活动。价值链将一个企业分解为战略性相关的许多活动，对于系统分析竞争优势的各种来源十分必要。现在，互联网和各种信息技术飞速发展，企业的生存环境发生了深刻的变化：信息系统技术的 Competitive advantage comes from many separate activities undertaken by enterprises in the process of design, production, marketing, delivery and auxiliary processes. The value chain breaks down a business into many activities that are strategically related and is necessary to systematically analyze the various sources of competitive advantage. Now, with the rapid development of the Internet and various information technologies, the living environment of enterprises has undergone profound changes: the information technology