... Elicitation 41 5.1 Overview 41 5.2 Definitions 42 5.3 PROBLEMS IN REQUIREMENTS ELECITATION 45 5.4 Difficulties of Elicitation 46 5.5 Elicitation Techniques 47 5.5.1 Traditional Approaches 47 5.5.2 Group elicitation 47 5.5.3 Representation-based approaches 47 5.5.4 Contextual (Social) Approaches 47 5.5.5 Cognitive approaches 48 5.6 Expressive Power Goal-based Approaches 48 Goal-Directed Strategy 48 5.6.2 Knowledge Acquisition: 52 5.7 Background Reading 53 5.7.1 Advantages of Background Reading 53 5.7.2 Disadvantages 54 5.8 Interviews 54 5.8.1 Types of interviews 54 5.8.2 Interviewing essentials 54 5.8.3 Interview Steps 54 5.8..4 Opening and closing and Following Up the interview 55 5.8.5 Conducting the Interview: Five Easy Steps 55 5.8.6 Advantages 56 5.8.7 Appropriate Situations 56 5.8.8 Disadvantages (Goguen and Linde, 1993, p154. 8) 56 5.9 Scenarios 56 5.9.1 Advantages 57 5.9.2 .Disadvantages 57 5.9.3 Task Models & Scenarios 57 5.10 Implementation of business application with scenario 57 5.10.1 Library case 57 5.10.2 Scenario 58 Ch 6 Modelling 60 6.1 Type of Model 60 Chapter 7 Quality of 00 Modelling 61 7.1 What Makes an 00 Model Good? 62 7.2 Characteristics of 00 Model 63 7.2.1 Size 63 72.2.2 Complexity 63 2.2.3 Coupling 63 7.2.4 Sufficiency 65 7.2.5 Completeness 65 7.2.6 Cohesion 66 7.2.7 Primitiveness 67 7.3.2 Fragility 67 7.3. Immobility 67 7.4 Achieving Quality Model 68 7.5 Class Diagrams 69 7.5.1 Perspectives 69 7.5.2 Associations, attributes and aggregation 70 7.5.3Generalization 71 7.5.4 Constraint Rules 71 When to Use Them 72 7.6 Summary 72 8. Use Case Modelling 73 8.1 Use Cases 73 8.2 Actors 74 8.2.1 Actors Categories 75 8.2.2 Actor Personalities 75 8.3 System Boundary 76 8.4 Stakeholders and their Concerns 76 8.5 Scenarios 77 8.5.1 What are they? How ...

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