SWE

...... Usually apply to the system as a whole and not to any specific use case.

The concept of usability is multifaceted. 

"Ease of access to and use of specific functionality" is the definition of:

"System capability to resist external disturbance, such as invalid input or shortage of resources. "

"Preciseness with which the system calculates values. "

"Sensitivity of the system to failures of some of its parts. "

Any threats to users, data, system components, or interoperating systems presented by use of the system.

The rate at which the system performs its tasks. This can be expressed in the number of transactions per minute.

The length of time it takes the system to finish processing and responding back to user requests.

.......... Is the ability of the software to be easily modified to accommodate enhancements and repairs.

Configurability is under:

......... and ........... Are sometimes called Flexibility

The languages the system supports.

Non-functional requirements may be very difficult to state precisely.

Imprecise requirements may be easy to verify.

The development team only writes the use cases.

Use cases later drive test case development.

Use cases force developers to think through the design of a system from the perspective of a user.

Use cases provide an ordering mechanism for requirements

A use case diagram is a UML-diagram

Every use case usually has a minimum of one primary actor

Development of the use cases may be done in parallel with the design and implementation of the user interface.

Can use iterative and incremental techniques to converge on the GUI and the use case at the same time.