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This chapter is from the book

This chapter is from the book

An Example

The abstract diagram on the previous page probably doesn’t look all that helpful, but let’s look at a real example. Here’s the supplier use case in both formats...

Ideal Case

  1. System displays list of products, alphabetically by type (vegetable, meat, herb, etc.).
  2. User selects item from list; system displays top three suppliers, ordered by preference. For each supplier, display name, phone number, and delivery days.

Ingredient Not Found

System transfers user to ingredient maintenance screen.

System Error

System displays descriptive message.

What do you think? Is the diagram clearer? Which would you use for a simple case like this? Either, both?

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