Payroll is the process by which an employer pays his employees for the work done. At the end of a payroll period, the employer calculates the exact earnings and deductions of each of his employee and pays the amount due to the employee. Detailed records are kept of the calculations and payments made.

DFD Level 0 is also called a Context Diagram. It’s a basic overview of the whole system or process being analyzed or modeled. It’s designed to be an at-a-glance view, showing the system as a single high-level process, with its relationship to external entities.

Draw the level zero dfd.

1. Draw external entities near edges of the diagram.
2. Draw and label flows to and from external entities (leave the center blank).
3. Draw internal flows. Remember that each process bubble must have input(s) and output(s).

Context Diagram. A context diagram is a top level (also known as “Level 0”) data flow diagram. It only contains one process node (“Process 0”) that generalizes the function of the entire system in relationship to external entities. DFD Layers.

According to ISO/IEC 15504 level 0 : Incomplete – the result of the process are hard to identify or are not produced adequately.The purpose of the process is not satisfied or is not implemented.

How to create a payroll management system for your small business

1. Choose the apt payroll software.
2. Gather information for payroll.
3. Calculate the Gross Pay and Net Pay.
4. Include the Employer Payroll Taxes.
5. Create a payroll entry system.
6. Document the compensation terms.
7. Generate the payroll documents.
8. The Bottomline.

Level 0 data flow diagrams show a single process node and its connections to external entities. Level 1 DFDs are still a general overview, but they go into more detail than a context diagram. In a level 1 data flow diagram, the single process node from the context diagram is broken down into subprocesses.

Data flow diagram levels Level 0 DFDs, also known as context diagrams, are the most basic data flow diagrams. They provide a broad view that is easily digestible but offers little detail. As these processes are added, the diagram will need additional data flows and data stores to link them together.

First Level DFD (1st Level) of Graphical Payroll 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 Graphical Payroll System system as a whole.

This is the Zero Level DFD of Payroll Management System, where we have eloborated the high level process of Payroll. It’s a basic overview of the whole Payroll Management System or process being analyzed or modeled.

First Level DFD (1st Level) of Graphical Payroll System shows how the system is divided into sub-systems (processes). The 2nd Level DFD contains more details of Login, Cheque, Payment Types, Salary Slips, Employee, Payment, Salary.

First Level Data flow Diagram (1st Level DFD) of Payroll Management System : It also identifies internal data stores of Department, Pay-Slip, Task, Salary, Leave that must be present in order for the Payroll system to do its job, and shows the flow of data between the various parts of Employee, Leave, Pay-Slip, Department, Task of the system.