Question

Draw the Data Flow Diagram for the following requirements

The School of Automation wants a new web application developed for managing their library. The items maintained in the library are books, videos, and software. Students, faculty, staff of the university, besides the residents of the state of Iowa are provided borrower privileges. A Call number uniquely identifies each item in the library. The phase 1 of the software involves

Adding a new item to the library: The details of the book are its ISBN Number, Copy number, Title, Author(s), Keywords, and Publisher. Similar details of other items are also captured. Please collect the attributes from the library system

Borrower verification: Any borrower is verified with the university records or with the State of Iowa, Dept of Public Safety for a valid driver's id.

Issues: At the time of issuing an item, it is marked as issued and issue register is updated with the borrower, book and due date information.

Returns: Similarly, at the time of returning an item, the item is taken of the issue register and placed in shelf.

Recalls: The borrower may recall the item issued to another borrower. When a recalled item becomes available, the requestor is sent an email automatically. In order to accomplish this, this system is required to populate an entry (with standard email contents) in an "Email To send” register maintained by an email application. (Assume the library has very good software for managing the email functionality). Besides sending an email to the requestor, the item must also be placed on hold for a week, to enable the requestor to pick it up at circulation desk.

Query: The borrower may also query the catalog items by any of its attributes.

Make appropriate assumptions.

Answer 1

The data flow diagram for the library management system with the given requirements is given below:

I've made this diagram using an online tool.

There are a total of 6 processes, 4 data stores, and 2 entities.

Let us understand the diagram. Some assumptions are made, and they are clearly stated in the explanation.

The first assumption is that the task of adding a new item to the library is done by the Librarian. The librarian sends as input the book information like ISBN number, title, etc. to the Add Item process. It then stores the book in the Shelf which is the next assumption. Now, for the borrowers to issue a book, they need to verify themselves by entering their Driver's ID. After verification, they can put the Issue Request for the desirable book. The Issue process stores the information (borrower, book and due date) of the book to be borrowed in the Issue Register. If a borrower needs to return a book, the book information is fetched from the Issue Register and placed in the Shelf. Now, the borrower can also Query a particular item by any of its attributes. This attribute information goes to the Query process and it outputs the item's information to the borrower. If the borrower recalls the item that is issued to some other borrower, as soon as the item becomes available, an entry is populated in the Email To Send Register and an email is sent to the requestor. Also, the item (book) is kept on hold for a week at the Circulation Desk to enable the requestor to pick it up from there.

That's how the above DFD works.

Hope it helped. If it did, please consider giving positive ratings as a lot of hard work goes into writing such answers. Thanks.