Non-functional Requirements - BA-Space
Non-functional
Non-functional
Requirements
Katerina Meshkova
skype: Katerina_Meshkova
1
To measure is to know. If you can not measure it,
you can not improve it
Lord Kelvin (1824 - 1907)
2
What is a Requrement
A requirement is a statement of
one of the following:
1. What a system must do
2. A known limitation or
constraint on resources or
design
3. How well the system must
do what it does
3
What is NFR (1)
Non-functional requirements define the overall qualities or
attributes of the resulting system
Non-functional requirements place restrictions on the
product being developed, the development process,
and specify external constraints that the product must
meet
4
What is NFR (2)
Examples of NFR include safety,
security, usability, reliability and
performance requirements
Project management issues (costs,
time, schedule) are often
considered as non-functional
requirements as well
5
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