The recipe style of writing use cases may be used to outline a use case early in the scoping phase of the project, but the interactions are ambiguous. 'Enter card' doesn't say where the card comes from or where it goes. 'The customer enters the card into the cash machine' fully defines the interaction.

A good use case is not:

	A business process
	A piece of code
	A recipe

	A description of the system
	A list of function