BPMN UML Diagram_UMLDesi_8A-Slide_1.pptx

BPMN UML BPMN UML Diagram_UMLDesi_8A-Slide_1.pptx

1. Systems Analysis and Design Ahmad Tasnim Siddiqui

2. System A system is an interrelated set of business procedures used within one business unit working together for a purpose A system exists within an environment A boundary separates a system from its environment

3. Characteristics of a System Components Interrelated Components Boundary Purpose Environment Interfaces Constraints Input Output

4. Definition and Characteristics of a System A system is an interrelated set of business procedures working together for a purpose within a boundary separating it from the environment. Key characteristics include components, boundaries, purpose, environment, inputs, outputs, interfaces, and constraints.

5. Important System Components Decomposition The process of breaking down a system into smaller components Allows the systems analyst to: Break a system into small, manageable subsystems Focus on one area at a time Concentrate on component pertinent to one group of users Build different components at independent times

6. Important System Concepts Modularity • Process of dividing a system into modules of a relatively uniform size • Modules simplify system design Coupling • Subsystems that are dependent upon each other are coupled Cohesion • Extent to which a subsystem performs a single function

7. System Environment and Interfaces A system operates within an environment and is separated by a boundary. It has interfaces to interact with external entities and is influenced by constraints. Inputs enter the system and outputs leave, with feedback mechanisms maintaining system performance.

8. Systems Development Life Cycle (SDLC) Series of steps used to manage the phases of development for an information system Consists of four phases: • Planning and Selection • Analysis • Design • Implementation and Operation

9. Phases: Planning, Analysis, Design, Implementation The SDLC includes four phases: Planning and Selection, Analysis, Design, and Implementation and Operation. These phase manage the development and deployment of information systems effectively.

10. Role of System Analyst Study problems and needs of an organization Determine best approach to improving organization through use of People, Methods, and Information technology Help system users and managers define the requirements for new or enhanced systems Assess options for system implementation For in-house projects, work on a team of analysts and developers

11. Skills of a Successful Systems Analyst Analytical • Understanding of organizations • Problem-solving skills • System thinking (Ability to see organizations and information systems as systems) Technical • Understanding of potential and limitations of technology Managerial • Ability to manage projects, resources, risk and change Interpersonal • Effective written and oral communication skills