To illustrate the three major functions, picture three boxes side by side by side. In the box to the left, you have the first major function: sales and marketing. In the middle box is the second: operations. In the box to the right, you have the third: finance and administration. You may call them by different names, but those are the three major functions. Sales and marketing generate business. Operations provides the service or manufactures the product, and takes care of the customer. Finance and administration manage the monies flowing in and out as well as the infrastructure.
所有公司必须有的三项主要功能：
1. 市场/业务：生成业务机会。
2. 运营：提供服务、生产产品、并且提供客户服务。
3. 财务和行政：提供现金流及基础设施。
