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Structured Development for Real-Time Systems, Volume 2: Essential Modeling Techniques by Stephen J. Mellor, Paul T. Ward

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Appendix D – Defect Inspection System

TABLE OF CONTENTS

1. Background

2. Context Schema

3. Event List

4. Entity Relationship Diagram

5. Leveled Set of Schemas

6. Data Dictionary

7. Transformation Specifications

Problem Statement

The purpose of the defect inspection system is to chop rolls of metal foil into sheets and to sort the sheets into two bins according to a preselected product standard. Those that meet the standard go into one bin; those that do not go into another.

The system is run by a supervisor and a number of operators. The supervisor is responsible for the overall running of the system including selecting product standards, configuring each of the production surfaces, and selecting sheet sizes.

The four production surfaces are ...

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