transformation of data from input to output through processes may be described

Transformation of data from input to output through

This preview shows page 33 - 38 out of 49 pages.

transformation of data from input to output, through processes, may be described logically and independently of the physical components associated with the system. The DFD is also known as a data flow graph or a bubble chart. TYPES OF DATA FLOW DIAGRAMS : Data Flow Diagrams are of two types as follows: (a)Physical DFD (b)Logical DFD 1 . 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 ensure that the current system has been clearly understood. Physical DFDs shows actual devices, departments, and people etc., involved in the current system 2. 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 basis for drawing the system’s structure charts. LOGIN PROCESS
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User Id Password ERROR IN INPUT Level-0 Description : The inputs to the process are User Id and Password given by the developer to allow the software available for the Admin environment. After giving the inputs the details, checks whether the entered ones are valid are not. It displays screen if match occurs otherwise error message if they are not matched. MAIN SCREEN PROCESS Level -1 LOGIN PROCESS SCREEN
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Description : This process mainly explains the different screens that are available for the admin. Here the selection of the screen depends on the admin and he can select whatever screen he wants. The different screens that are available are Add Emp details, Add skill Report, Add placement report, Add Training Report, Add Compensation Report.
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4.8.3 Process Specification and Decision Table 4.8.4 Control flow diagram 5.0 Testing 5.1 Testing Plan Any system, to be successful, must be thoroughly tested, and well managed test plan should be prepared before actual testing is being performed. “Modules” have been developed and need to be tested in a manner that can reduce occurring of defects as low as possible. Following are the activities we planned to test the system.
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This system is indeed an evolutionary system so every unit of the system is continuously under testing phase. One test activity “Basis Path Testing” that will try to cover all paths in the system. This activity identifies all paths that provide different functionality of the system, and also other paths to reach at that functionality. Other testing activity is ”Control Structure Testing”, which will test each and every condition with positive and negative data combination. This testing activity will also perform “Data Floe Testing” in which it will be tested how the data re following the system. And will also check whether the data entered from one procedure, is reflected whenever it requires or not.
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