How many subsystems does the marketing information system consist of?

(1) Internal reporting system: The main task is to provide relevant sales information to managers. Cost? Inventory? Cash flow? Accounts receivable and other information reflecting the current operating conditions of the enterprise?

(2) Marketing information system: refers to various sources and procedures used by marketing managers to understand the development trend of the external environment?

(3) market research system: the main task is to collect? Evaluation? Communicate all kinds of information necessary for managers to make decisions?

(4) Marketing analysis system: Its task is to improve operation or achieve the best operational efficiency.