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transformation of data from input to output, through processes, may bedescribed logically and independently of the physical componentsassociated with the system. The DFD is also known as a data flowgraph or a bubble chart. TYPES OF DATA FLOW DIAGRAMS:Data Flow Diagrams are of two types as follows:(a)Physical DFD(b)Logical DFD1.PHYSICAL DFD:Structured analysis states that the current system should be first understand correctly. The physical DFD is the model of the current system and is used to ensurethat the current system has been clearly understood. Physical DFDs shows actual devices, departments, and people etc., involved in the current system2. LOGICAL DFD:Logical DFDs are the model of the proposed system. They clearly should show the requirements on which the new system should be built. Later during design activity this is taken as the basisfor drawing the system’s structure charts.LOGIN PROCESS
User IdPasswordERROR ININPUTLevel-0Description:The inputs to the process are User Id and Passwordgiven by the developer to allow the software available for theAdmin environment. After giving the inputs the details, checkswhether the entered ones are valid are not. It displays screen ifmatch occurs otherwise error message if they are not matched.MAIN SCREEN PROCESSLevel -1LOGINPROCESSSCREEN
Description:This process mainly explains the different screensthat are available for the admin. Here the selection of the screendepends on the admin and he can select whatever screen hewants. The different screens that are available are Add Empdetails, Add skill Report, Add placement report, Add TrainingReport, Add Compensation Report.
4.8.3 Process Specification and Decision Table4.8.4 Control flow diagram5.0 Testing5.1 Testing PlanAny system, to be successful, must be thoroughly tested, andwell managed test plan should be prepared before actual testingis being performed. “Modules” have been developed and need tobe tested in a manner that can reduce occurring of defects as lowas possible. Following are the activities we planned to test thesystem.
This system is indeed an evolutionary system so every unitof the system is continuously under testing phase.One test activity “Basis Path Testing” that will try to coverall paths in the system. This activity identifies all paths thatprovide different functionality of the system, and also otherpaths to reach at that functionality.Other testing activity is ”Control Structure Testing”, whichwill test each and every condition with positive andnegative data combination.This testing activity will also perform “Data Floe Testing” inwhich it will be tested how the data re following thesystem. And will also check whether the data entered fromone procedure, is reflected whenever it requires or not.