letsgrow non-functional requirements
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Non-functional requirementsJune 24, 2009
(Patrick Kalkman, Robert-Jan Kuijvenhoven)
24/06/2009 2
Agenda
Non-Functional Requirements
• Intention of the meeting• Introduction•Workshop•Workshop Result• ISO 9126 / QUINT•Conclusion
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Intention of this meeting
Non-Functional Requirements
1. Sharing knowledge about Non-functional requirements
2. Determine if Non-functional requirements need more attention
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Introduction
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• What are Non-functional requirements
“Functional requirements define WHAT a system is supposed to do”
“Non-Functional requirements define HOW a system is supposed to be”
“Non-functional requirements are often called qualities of a system”
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Introduction
Non-functional requirements are:
• Often implicit!• Often unclear!• Just as important as functional requirements?• Or are functional Requirements “Must Haves”
and Non-functional Requirements “Nice to Have”?
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Non-functional Requirements?
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Who knows a Non-functional requirements?
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Non-Functional Requirements?
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Can Non-functional requirements conflict and interact with other Non-functional requirements?
Who knows examples of these conflicts?
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Workshop Non-Functional Requirements
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Determine the 3 most important Non-functional requirements for Project X.
Time: 30 minutes
Write result on flip-over1. Which Non-functionals?2. Rationale? 3. Proces?
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Workshop Non-Functional Requirements Divide into groups
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Group1:- Person 1- Person 2- Person 3
Group2:- Person 1- Person 2- Person 3
Group4:- Person 1- Person 2- Person 3
Group3:- Person 1- Person 2- Person 3
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Workshop Results
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Each group presents
1. Which Non-functionals?2. Rationale? 3. Proces?
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Recent projects without focus on Non-functionals
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• Project 1 / (Degradability)• Project 2 / (Performance)• Project 3/ (Performance)• Project 4 / (User friendly)• Project 5 / (Performance)• Project 6 / (Testability)
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ISO 9126 / QUINT
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Recap Non-functional requirements
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• Now familiar with non-functional requirements• Can be determined efficiently through a workshop• QUINT can give checklist with possible non-Functionals• QUINT also shows how to measure non-Functional
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Conclusion
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Should we focus more on Non-functional requirements?
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Questions?
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We have a question for you?
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What is most important Non-functional requirement of your current project?