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Analysis stages

Analysis stages. Introduction . Objectives. In this session you will: Recap on Systems Analysis Key drivers Introduce to the techniques for requirement Elicitation Interview Observation Questionnaires. Findings from case study. Key drivers identified from the case study

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Analysis stages

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  1. Analysis stages Introduction

  2. Objectives In this session you will: • Recap on Systems Analysis Key drivers • Introduce to the techniques for requirement Elicitation • Interview • Observation • Questionnaires

  3. Findings from case study • Key drivers identified from the case study • What is a centralised system?

  4. Typical Reasons to Initiate a ProjectRecap Problems with existing systems Desire to exploit new opportunities Increasing competition Perception of potential benefit by individualcapable of initiatingchange Systems developmentprocess initiated Desire to make moreeffective use of information Organizational growth Merger or acquisition Change in market orexternal environment The need to reduce staff cost

  5. Who should be involved in Systems Analysis? Managers System stakeholders Programmers Systems analyst Users Technicalspecialists Vendors and suppliers

  6. System Requirements Checklist • System requirement looks for: • Outputs • Inputs • Processes • Performance • Controls

  7. Analysis Activities • Gather information to learn problem domain • Define system requirements • Build prototypes for discovery of requirements • Prioritise requirements • Generate and evaluate alternatives • Review recommendations with management

  8. Structured Analysis • Define what system needs to do (processing requirements)‏ • Define data system needs to store and use (data requirements)‏ • Define inputs and outputs • Define how functions work together to accomplish tasks • Data flow diagrams (DFD) and entity relationship diagrams (ERD) show results of structured analysis

  9. Data Secondary Primary Data Variables Attributes Continuous Discrete

  10. Sources of Data • Internal Sources • Users, stakeholders, managers • Organisation charts • Forms and documents • Procedure manuals and policies • Financial reports • IS manuals • Other measures of business processes • External Sources • Customers • Suppliers • Stockholders • Government agencies • Competitors • Outside groups • Journals, etc. • Consultants

  11. Data Collection process

  12. The collection of data Source of secondary data Random sampling Data Quasi sampling Sampling and the size of sample Survey methods of collecting data The collection of data Interview Non random sampling Postal questionnaire Questionnaire design

  13. Data • What are data? • Fact • Figures • Information measurements • Types of data • Attributes/variables • Attributes= something an object has or has not • Variable is something which can be measured

  14. Elicitation Techniques • Traditional techniques • Introspection • Reading existing documents • Analysing hard data • Interviews • Open-ended • Structured • Surveys / Questionnaires • Meetings • Collaborative techniques • Group techniques • Focus Groups • Brainstorming • JAD/RAD workshops • Prototyping • Participatory Design • Cognitive techniques • Task analysis • Protocol analysis • Knowledge Acquisition Techniques • Card Sorting • Laddering • Repertory Grids • Proximity Scaling Techniques • Contextual approaches • Ethnographic techniques • Participant Observation • Ethnomethodology • Discourse Analysis • Conversation Analysis • Speech Act Analysis • Sociotechnical Methods • Soft Systems Analysis

  15. Exercise Research and prepare a PowerPoint presentation on how a survey can be used to gather data to support the development of Information System for a business. Your presentation should: 1.Define what a survey is? 2.Identify different steps for conducting a survey 3.Define the type of data that can be gathered 4.Explain how data gathered can be analysed for the purpose of the business’s information system?

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