Exercise 4
7. Draw the HIPO diagram of the library management system of [Example 4.2].
[Example 4.2] Functional division of library management system.
The library management system has many functions, such as reader management, book collection and editing, book circulation, book inquiry, etc. Each function can be divided into several sub-functions, so the module structure can adopt a tree structure, and the control center of the module is a tree structure. The root reader can only enter the book query module; the staff of the book circulation department can only enter the book circulation (borrowing and returning books) module and the reader management (divided into three sub-functions of adding, deleting and modifying readers) module; the book collection and editing module The staff of the department can enter the book purchasing and warehousing and book coding modules. System functions are decomposed from top to bottom by the control center.
The HIPO diagram is as follows:
The picture is as follows: **
