SDLC

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Introduction of Topic: 

Introduction of Topic System development life cycle

Group members: 

Group members Muhammad Saleem Muhammad Haris Shazia Aziz

Systems Development Life Cycle: 

Systems Development Life Cycle Organized way to build information systems Consists of six phases The phases are called the life cycle because they cover the entire life of an information system

SDLC: 

SDLC

Systems Development Life Cycle: 

Systems Development Life Cycle Phase 1: preliminary investigation This phase is ground level and initial phase of SDLC.it is too much time consuming phase, almost half of the time to complete the SDLC is taken by this pahse.The main objectives of this phase are: Conduct the preliminary analysis Propose alternative solution Describe the costs and benefits Submit the report

Systems Development Life Cycle: 

Systems Development Life Cycle 1-Conduct the preliminary investigation To find the objectives of organization Nature and scope of problem To see the faults of older system Make the ideas for the new system

Systems Development Life Cycle: 

Systems Development Life Cycle 2-Propose the alternative solution No change Little change Totally change

Systems Development Life Cycle: 

Systems Development Life Cycle 3-Describe cost and benefits Whichever the alternative is chosen, it will have cost and benefits. in this step, you need to indicate these. 4-Write a report Submission of prepared report about new software. this report is also called the feasibility report. In this report you should describe the solution,cost,benefits etc

Systems Development Life Cycle: 

Systems Development Life Cycle Phase 2: Systems analysis After preparation of the feasibility report the system is analyzed accordingly. The main objectives of this phase are Gather data Analyze the data Write a report

Systems Development Life Cycle: 

Systems Development Life Cycle 1-Gather data :-- data is gathered through the different written documents, interview employees and managers, develop questionnaires and by observing people. 2-Analyze data :-- Once the data has been gathered, many analytical or modeling tools are used.

Systems Development Life Cycle: 

Systems Development Life Cycle Modeling tools:- Modeling tools enable a system analyst to present representation of a system. There are different tools for analyzing data these are: DFD (data flow diagram) ERD (entity relationship diagram) CASE (computer aided software engineering)

Systems Development Life Cycle: 

Systems Development Life Cycle DFD (data flow diagram) it is a modeling tool which shows the flow of data through a system. some symbols are used in DFD

Systems Development Life Cycle: 

Systems Development Life Cycle DFD (data flow diagram) Provide a logical map of the problem Defines the data stores and processes Shows how data moves and changes

Example Flow Chart Symbols: 

Example Flow Chart Symbols Process Predefined Process Alternate Process Decision Data Document Terminator Manual Input Extract Merge Connector Delay Data Storage Display Off page Connector Manual Operation Preparation

Systems Development Life Cycle: 

Systems Development Life Cycle Example

Systems Development Life Cycle: 

Systems Development Life Cycle Phase-3 Design the system Do the preliminary design Do a detail design Write a report

Systems Development Life Cycle: 

Systems Development Life Cycle Do the preliminary design prototyping is often done at this stage. . Prototyping prototyping refers to using workstations,CASE tools and other software applications to build working models of system components so that they quickly tested and evaluated.Thus a prototype is a limited working system.

Systems Development Life Cycle: 

Systems Development Life Cycle Analysis concentrates on what the purposed system should do, design concentrates on how the system will accomplish those goals.

Systems Development Life Cycle: 

Systems Development Life Cycle Translating alternative solution generated by analysis phase into detailed logical and physical system specifications. Logical design : not tied to any hardware or software platform Physical design : specific programming languages, databases, architectures

System development life cycle: 

System development life cycle Define database, load with data, and review with users Define inputs, and review with users Define outputs, and review with users Define interfaces, and review with users Define other controls, and implement.

Conclusion: 

Conclusion

: 

End of topic