Chapter 3. Defining Business Rules
3.1 Rule statements
In this chapter, we concentrate on what a business rule looks like. This begs the question of how we find rules in the first place, but that“s the subject of the next chapter. On balance, it“s probably better to start with a description of what to look for rather than how to find it.
3.1.1 Business rule characteristics
Broadly speaking, business rules are constraints: They define conditions that must hold true in specified situations. Sometimes called invariants, business rules are not descriptions of a process or processing. Rather, they define the conditions under which a process is carried out or the new conditions that will exist after a process has been completed. (The word process ...
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