1 What is a System? A system is a collection of interrelated components that work together to perform a specific task. 2 What are the examples for Systems? 3 If we consider human body it has following subsystems 4 Extra Curricular Activities 5 Develop Knowledge,skills,attitudes 6 Basic Elements of a system 7 Input Input process School System Processing Output Output Students 8 Input Processing Output Food Water Oxygen Medicine 9 ***For additional information Open and Close Systems …… 10 Open and Close Systems …… Close Systems 11 Computer Based Information System 12 Benefits of any type of computer based information system 13 Differences between manual system and Computer based Information System 14 System Development Life Cycle (SDLC) 15 SDLC cont…. To create a new computerized system, the relevant company should give the contract of developing to a “software Developing company” In “software Developing company” there is a “software Developing team” A team consist with following team members Project manager is the team leader System Analyst System Designer System Developer/ programmer/ sw engineer QA ( Quality Assauer) System Administrator 16 1. Identification of requirements 17 1. Identification of requirements cont…. 18 1. Identification of requirements cont…. 19 1. Identification of requirements cont…. 20 2.Designing the solution 21 Other activities of Designing the solution 22 3.Coding the solution In development the task of building up a computerized system is done by codings. According to the database and interfaces designed by the designer, the system developer use necessary programming languages and software, to develop the system. 23 4. Testing and Debugging After developing the computerized system with coding, it should be tested properly to check whether there are any errors. There can be coding errors, Designing errors or requirement errors. It should be tested all the functional and non functional requirements are gained properly. 24 A system can be tested in four steps. 25 5. Deployment of the system 26 1. Direct deployment 2. parallel deployment 27 3. Pilot deployment System is deploying for a selected part of the company. If that successful move to another part to deploy. System is deployed in stages. Success of each stage will leads to deployed the next stage. 4. Phased deployment 28 6.Maintenance of the system 29 Requirements for maintenances |