| 1. | Consider the tests in Figure 13.8. Write some tests that are likely to be useful additions. |
| 2. | Invent a business rule for the calculated grace period. Design a Fit table and add some tests. |
| 3. | Consider other possible table structures for Figure 13.8. |
| 4. | Select a business rule of relevance to you that involves calculations or decisions. |
| 5. | Work with one or two others to discuss the selected business rule as a Fit test. |
| 6. | What are the givens? What is being calculated? |
| 7. | If your business rule is at all complex, start with a small part of it and evolve the table step by step by adding more cases, as we showed in this chapter. |
| 8. | As your tables evolve, reconsider the vocabulary as you progress. Can it be made clearer? |
| 9. | Feel free to completely change things at any point; as you attempt to express the tests, you may find better ways to do so. |
| 10. | Try to use realistic examples, even if you have to simplify them initially. |
| 11. | You may find it useful to break the test into several tables. |
| 12. | Are you in fact tackling two or more related business rules? If so, split them. |