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Data Model Patterns by Richard Barker, David C. Hay

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8. The Laboratory

Many companies and government agencies use laboratories to analyze materials for various purposes. A laboratory could be used by a regulatory agency to identify salmonella in eggs, by a chemical manufacturer to determine a product grade, or by a quality assurance department to identify contaminants in a product. Whatever the purpose of the laboratory, the underlying model is common to them all.

Samples, Tests, and Observations

The laboratory process begins with a SAMPLE. (See Figure 8.1.) A SAMPLE could be taken from a SITE, or it could be more specifically taken from an ASSET—a PIECE OF EQUIPMENT or an INVENTORY. Here, a PIECE OF EQUIPMENT may be a tank, a machine, or even a spigot. The ASSET is itself currently at a SITE ...

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