Download Article: SNAP_APM_2_2

Part 1 – The SNAP Method
Assessment Preparation
Estimated and Final Non-functional Assessment
It is important to realize that early non-functional assessments are estimates of to-be-delivered
non-functional requirements. In addition, as the scope is clarified and the requirements
developed / evolved, it is quite normal to identify additional non-functional characteristics,
which were not specified in the original requirements. This phenomenon is sometimes called
“scope creep.” It is essential to update the application size upon completion of the project. If
the size changes during development, then the non-functional size at the end of the life cycle
should accurately reflect the full non-functional characteristics delivered to the user.
3-4
Assessment Practices Manual
May 2015