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Use cases are NOT system requirements. E.g. “the system displays the patient’s lab results sorted by most recent first” is NOT a use case.
Examples of Use Cases:
Prescribing-Dispensing Use Cases
WHY Use cases?
Use cases allows an analyst with no detailed or technical knowledge of current system to document the user’s needs
Use cases force the analyst to think specifically about the user’s needs without worrying about system constraints or design considerations, even for analysts with extensive knowledge of the system.
Use cases are easily understandable by everyone
Use cases are easily reviewable by users or other stakeholders