It may require more functionalities of Library Management to reach the necessary level of detail about the Library Management functioning. Second Level Data flow Diagram(2nd Level DFD) of Library Management System :ĭFD Level 2 then goes one step deeper into parts of Level 1 of Library Management. Processing Student records and generate report of all Student.Processing Employee records and generate report of all Employee.Processing Publisher records and generate report of all Publisher.Processing Authors records and generate report of all Authors.Processing Issue Book records and generate report of all Issue Book.Processing Book records and generate report of all Book.Processing Library records and generate report of all Library.Main entities and output of First Level DFD (1st Level DFD):

You will highlight the main functionalities of Library Management. DFD Level 1 provides a more detailed breakout of pieces of the 1st level DFD. It also identifies internal data stores of Student, Employee, Publisher, Authors, Issue Book that must be present in order for the Library Management system to do its job, and shows the flow of data between the various parts of Library, Issue Book, Employee, Student, Publisher of the system. First Level Data flow Diagram(1st Level DFD) of Library Management System :įirst Level DFD (1st Level) of Library Management System shows how the system is divided into sub-systems (processes), each of which deals with one or more of the data flows to or from an external agent, and which together provide all of the functionality of the Library Management System system as a whole.

Dfd for library management system