use case

[afsaneh100]

تفاوت بین business use case و system use case رو میخواستم اگه ممکنه با مثال توضیح بدید.

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موضوعات مشابه:

• The Case of the Slow Logons

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[th95]

Use case - Wikipedia, the free encyclopedia

Use cases may be described at the abstract level (business use case, sometimes called essential use case), or at the system level (system use case). The differences between these is the scope.

• A business use case is described in technology-free terminology which treats system as a black box and describes the business process that is used by its business actors (people or systems external to the business) to achieve their goals (e.g., manual payment processing, expense report approval, manage corporate real estate). The business use case will describe a process that provides value to the business actor, and it describes what the process does. Business Process Mapping is another method for this level of business description.
• A system use case is normally described at the system functionality level (for example, create voucher) and specifies the function or the service that the system provides for the user. A system use case will describe what the actor achieves interacting with the system. For this reason it is recommended that a system use case specification begin with a verb (e.g., create voucher, select payments, exclude payment, cancel voucher). Generally, the actor could be a human user or another system interacting with the system being defined.

A use case should:

• Describe what the system shall do for the actor to achieve a particular goal.
• Include no implementation-specific language.
• Be at the appropriate level of detail.
• Not include detail regarding user interfaces and screens. This is done in user-interface design.