System Analysis Methods
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This document discusses system analysis methods. It defines system analysis as a problem solving technique that decomposes a system into component pieces to study how well they work and interact. The document outlines the objectives, stages, and phases of system analysis. It describes two main approaches: model-driven analysis which uses models like data flow diagrams; and accelerated system analysis which uses prototypes. Model-driven analysis can be structured analysis, information engineering, or object-oriented analysis. Accelerated approaches emphasize prototypes to rapidly identify requirements.
![INTRODUCTION
• Problem solving technique
• decomposes a system into its component pieces for the purpose of
studying how well those component parts work and interact to
accomplish their purpose [1]
• collects actual data, understand the processes involved, identify the
problems and recommend feasible suggestions for improving the
system functioning [1][3]](https://image.slidesharecdn.com/systemanalysismethods-150825171505-lva1-app6891/85/System-Analysis-Methods-3-320.jpg)
![OBJECTIVES
• To find answers for each business process: [3]
• What is being done?
• How is it being done,?
• Who is doing it,
• When is he doing it,
• Why is it being done and How can it be improved?](https://image.slidesharecdn.com/systemanalysismethods-150825171505-lva1-app6891/85/System-Analysis-Methods-4-320.jpg)
![SYSTEM ANALYSIS APPROACHES
1] Model-driven Analysis
• Structured Analysis
• Information Engineering
• Object-Oriented Analysis
2] Accelerated System Analysis
• Discovery Prototyping
• Rapid Architected Analysis](https://image.slidesharecdn.com/systemanalysismethods-150825171505-lva1-app6891/85/System-Analysis-Methods-8-320.jpg)
System Analysis Methods
- 1. SYSTEM ANALYSIS METHODS Prepared By: Hemant Raj Singh Roll no:12 CSIT 4th semester
- 2. CONTENTS • Introduction • Objectives • Stages of the System Analysis • System Analysis Phase • System Analysis Approaches • Conclusion • References
- 3. INTRODUCTION • Problem solving technique • decomposes a system into its component pieces for the purpose of studying how well those component parts work and interact to accomplish their purpose [1] • collects actual data, understand the processes involved, identify the problems and recommend feasible suggestions for improving the system functioning [1][3]
- 4. OBJECTIVES • To find answers for each business process: [3] • What is being done? • How is it being done,? • Who is doing it, • When is he doing it, • Why is it being done and How can it be improved?
- 5. STAGES OF SYSTEM ANALYSIS • Fact Finding • Understanding the current system • Produce data flow diagrams • Identify the user requirements • Interpret the user requirements • Agree the objectives with the user • Collect data from the current system
- 6. SYSTEM ANALYSIS PHASE Scope Definition Phase – WHAT PROBLEM • Is the project worth looking at to solve problem? Problem Analysis Phase – WHAT ISSUES • Is a new system worth building? Requirements Analysis Phase – WHAT REQUIREMENTS • WHAT do the users need and want from the new system? Logical Design Phase – WHAT TO DO • WHAT must the new system do to satisfy users’ needs? Decision Analysis Phase – WHAT SOLUTION • WHAT is the best solution among others?
- 8. SYSTEM ANALYSIS APPROACHES 1] Model-driven Analysis • Structured Analysis • Information Engineering • Object-Oriented Analysis 2] Accelerated System Analysis • Discovery Prototyping • Rapid Architected Analysis
- 9. 1. Modern Driven Analysis • Emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. • Developed system model becomes the blueprint for designing and constructing an improved system. Model – a representation of either reality or vision. Since “a picture is worth a thousand words,” most models use pictures to represent the reality or vision.
- 10. 1. Modern Driven Analysis 3 Types • Structured analysis: • Focuses on the flow of data through processes • Key Model: Data flow diagram • Information engineering:- • Focuses on structure of stored data • Key Model: Entity Relationship Diagram • illustrate and synchronize the system’s data and processes • Object-oriented analysis:- • Integrated data and process concerns into objects • illustrate the system’s objects from various perspectives such as structure and behavior.
- 11. 2. Accelerated System Analysis •approaches emphasize the construction of prototypes to more rapidly identify business and user requirements for a new system. Prototype – a small-scale, incomplete, but working sample of a desired system. Types: • Discovery Prototyping • Rapid Architected Analysis
- 12. 2. Accelerated System Analysis • Discovery prototyping : • identify the users’ business requirements by building a small-scale, representative or working model of the users’ requirements in order to discover or verify them • Rapid Architected Analysis : • derive system models from existing systems or discovery prototypes. • Similar to reverse engineering
- 13. CONCLUSION • Systems analysis is an iterative process that continues until a preferred and acceptable solution emerges.
- 14. REFERENCES 1. http://www.wikipedia.org/systemanalysis last accessed on 24th August,2015 2. http://www.slideshare.net/systemanalysis last accessed on 24th August,2015 3. http://www.safaribookoline.com/library/view/systemanlysis last accessed on 24th August,2015 4. http://www.answer.com/advantages_&_disadvantages_system_analysis last accessed on 24th August,2015
- 15. THANKYOU!
Editor's Notes
- #4: Systems analysis is a problem solving technique that decomposes a system into its component pieces for the purpose of the studying how well those component parts work and interact to accomplish their purpose.
- #6: Systems analysis is a problem solving technique that decomposes a system into its component pieces for the purpose of the studying how well those component parts work and interact to accomplish their purpose.
- #7: Systems analysis is a problem solving technique that decomposes a system into its component pieces for the purpose of the studying how well those component parts work and interact to accomplish their purpose.
- #10: a problem-solving approach that emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system model becomes the blueprint for designing and constructing an improved system.
- #11: Structured Analysis : illustrate the system’s components: processes (functions, tasks) and their associated inputs, outputs, and files
- #13: Discover prototyping is implemented somehow in a quick basis by testing a prototype towards user’s requirements RAA: built system models from previously built prototypes Rapid Architecture Analysis can also be said as reverse engineering => the use of technology that reads the program code for an existing database and automatically generates the equivalent system model.
- #14: Systems analysis is a problem solving technique that decomposes a system into its component pieces for the purpose of the studying how well those component parts work and interact to accomplish their purpose.
- #15: Systems analysis is a problem solving technique that decomposes a system into its component pieces for the purpose of the studying how well those component parts work and interact to accomplish their purpose.