Data Flow Diagrams

Data Flow Diagram Tutorial

Objectives

After completion of study of this unit you should be able to:

• Describe the use of data flow diagrams

• Produce a data flow diagram from a given case study including different levels

• Distinguish between the different categories of data flow diagrams

1. Introduction

1.1 CASE tools

1.2 Development and purpose of Data Flow Diagrams

2. Components of Data Flow Diagrams

2.1 Components

2.2 Hints on drawing

2.3 Data flows

3. Developing Data Flow Diagrams

3.1 Introduction

3.2 Context diagram

3.3 Level 1 Data Flow Diagram

3.4 Lower levels of Data Flow Diagrams

3.5 Check list

4. Categories of Data Flow Diagrams

4.1 Physical

4.2 Logical

4.3 The relationship between logical and physical Data Flow Diagrams

5. An example of the development of a Data Flow Diagram

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