1. Introduction

2. Categories of Modelling Software

2.1 Spreadsheet Add-ins

2.2 Conventional Programming Languages

2.3 Matrix Generator Languages

2.4 Algebraic MP Languages

3. Practical Example: Oil Blending Model

3.1 Blending of Heavy Fuel Oil

3.2 Two-Component Blends

3.3 Three-Component Blends

4. Many-Component Blends

4.1 Maximising the Sum of the Qualities

4.2 Maximising the Specific Gravity

4.3 The Problem as an LP

5. Minimising the Cost of the Blend

5.1 First Set of Costs

5.2 Second Set of Costs

5.3 Third Set of Costs

6. Limits on the Availability of Components

7. Blending by Weight and by Volume

8. Conclusions

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