Systems Analysis and Design - Alan Dennis

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Résumé :

Preface v

Part 1 Planning Phase

1 The Systems Analyst and Information Systems Development, 3

Introduction, 4

The Systems Analyst, 6

Systems Analyst Skills, 6

Systems Analyst Roles, 7

The Systems Development Life Cycle, 8

Planning, 10

Analysis, 11

Design, 12

Implementation, 12

Project Identification and Initiation, 13

System Request, 15

Applying the Concepts at Dr?nTeq, 16

Feasibility Analysis, 19

Technical Feasibility, 20

Economic Feasibility, 21

Organizational Feasibility, 27

Applying the Concepts at Dr?nTeq, 29

Chapter Review, 31

Appendix 1A: Detailed Economic Feasibility Analysis for Dr?nTeq, 35

2 Project Selection and Management, 37

Introduction, 38

Project Selection, 39

Applying the Concepts at Dr?nTeq, 40

Creating the Project Plan, 41

Project Methodology Options, 42

Selecting the Appropriate Development Methodology, 49

Staffing the Project, 52

Staffing Plan, 52

Coordinating Project Activities, 55

Managing and Controlling the Project, 58

Refining Estimates, 58

Managing Scope, 60

Timeboxing, 60

Managing Risk, 61

Applying the Concepts at Dr?nTeq, 62

Staffing the Project, 63

Coordinating Project Activities, 64

Chapter Review, 65

Part 2 Analysis Phase

3 Requirements Determination, 71

Introduction, 72

The Analysis Phase, 72

Requirements Determination, 74

What Is a Requirement?, 74

The Process of Determining Requirements, 78

The Requirements Definition Statement, 78

Requirements Elicitation Techniques, 80

Requirements Elicitation in Practice, 80

Interviews, 81

Joint Application Development (JAD), 88

Questionnaires, 92

Document Analysis, 94

Observation, 96

Selecting the Appropriate Techniques, 96

Requirements Analysis Strategies, 98

Problem Analysis, 98

Root Cause Analysis, 98

Duration Analysis, 100

Activity-Based Costing, 100

Informal Benchmarking, 100

Outcome Analysis, 101

Technology Analysis, 101

Activity Elimination, 102

Comparing Analysis Strategies, 103

Applying the Concepts at Dr?nTeq, 103

Eliciting and Analyzing Requirements, 103

Requirements Definition, 104

System Proposal, 104

Chapter Review, 106

4 Understanding Processes with Use Cases and Process Models, 111

Introduction, 112

What Is a Use Case?, 113

The Use Case Concept in a Nutshell, 113

Use Case Formats and Elements, 114

Casual Use Case Format, 114

Use Cases in Sequence, 117

Applying Use Cases, 118

Use Case Practical Tips, 118

Use Cases and Functional Requirements, 119

Use Cases and Testing, 119

Creating Use Cases, 120

Identify the Major Use Cases, 120

Identify the Major Steps for Each Use Case, 122

Identify Elements within Steps, 125

Confirm the Use Case, 128

Revise Functional Requirements Based on Use Cases, 129

Applying the Concepts at Dr?nTeq, 129

Identifying the Major Use Cases, 129

Elaborating on the Use Cases, 130

Data Flow Diagrams, 134

Reading Data Flow Diagrams, 134

Elements of Data Flow Diagrams, 136

Using Data Flow Diagrams to Define Business Processes, 139

Process Descriptions, 142

Creating Data Flow Diagrams, 144

Creating the Context Diagram, 145

Creating Data Flow Diagram Fragments, 146

Creating the Level 0 Data Flow Diag...

Sommaire:

Preface v

Part 1 Planning Phase

1 The Systems Analyst and Information Systems Development, 3

Introduction, 4

The Systems Analyst, 6

Systems Analyst Skills, 6

Systems Analyst Roles, 7

The Systems Development Life Cycle, 8

Planning, 10

Analysis, 11

Design, 12

Implementation, 12

Project Identification and Initiation, 13

System Request, 15

Applying the Concepts at Dr?nTeq, 16

Feasibility Analysis, 19

Technical Feasibility, 20

Economic Feasibility, 21

Organizational Feasibility, 27

Applying the Concepts at Dr?nTeq, 29

Chapter Review, 31

Appendix 1A: Detailed Economic Feasibility Analysis for Dr?nTeq, 35

2 Project Selection and Management, 37

Introduction, 38

Project Selection, 39

Applying the Concepts at Dr?nTeq, 40

Creating the Project Plan, 41

Project Methodology Options, 42

Selecting the Appropriate Development Methodology, 49

Staffing the Project, 52

Staffing Plan, 52

Coordinating Project Activities, 55

Managing and Controlling the Project, 58

Refining Estimates, 58

Managing Scope, 60

Timeboxing, 60

Managing Risk, 61

Applying the Concepts at Dr?nTeq, 62

Staffing the Project, 63

Coordinating Project Activities, 64

Chapter Review, 65

Part 2 Analysis Phase

3 Requirements Determination, 71

Introduction, 72

The Analysis Phase, 72

Requirements Determination, 74

What Is a Requirement?, 74

The Process of Determining Requirements, 78

The Requirements Definition Statement, 78

Requirements Elicitation Techniques, 80

Requirements Elicitation in Practice, 80

Interviews, 81

Joint Application Development (JAD), 88

Questionnaires, 92

Document Analysis, 94

Observation, 96

Selecting the Appropriate Techniques, 96

Requirements Analysis Strategies, 98

Problem Analysis, 98

Root Cause Analysis, 98

Duration Analysis, 100

Activity-Based Costing, 100

Informal Benchmarking, 100

Outcome Analysis, 101

Technology Analysis, 101

Activity Elimination, 102

Comparing Analysis Strategies, 103

Applying the Concepts at Dr?nTeq, 103

Eliciting and Analyzing Requirements, 103

Requirements Definition, 104

System Proposal, 104

Chapter Review, 106

4 Understanding Processes with Use Cases and Process Models, 111

Introduction, 112

What Is a Use Case?, 113

The Use Case Concept in a Nutshell, 113

Use Case Formats and Elements, 114

Casual Use Case Format, 114

Use Cases in Sequence, 117

Applying Use Cases, 118

Use Case Practical Tips, 118

Use Cases and Functional Requirements, 119

Use Cases and Testing, 119

Creating Use Cases, 120

Identify the Major Use Cases, 120

Identify the Major Steps for Each Use Case, 122

Identify Elements within Steps, 125

Confirm the Use Case, 128

Revise Functional Requirements Based on Use Cases, 129

Applying the Concepts at Dr?nTeq, 129

Identifying the Major Use Cases, 129

Elaborating on the Use Cases, 130

Data Flow Diagrams, 134

Reading Data Flow Diagrams, 134

Elements of Data Flow Diagrams, 136

Using Data Flow Diagrams to Define Business Processes, 139

Process Descriptions, 142

Creating Data Flow Diagrams, 144

Creating the Context Diagram, 145

Creating Data Flow Diagram Fragments, 146

Creating the Level 0 Data Flow Diag...