Microsoft PowerPoint seg3101-ch2-3 ElicitationTechniques ppt

Use Case Templates – Multiple Column Form
•
One column per actor
•
Allows for a more detailed view
User's actions
System responses
1.
Insert a card in the Card reader
slot.
(card is not valid see alternative 1.1)
2.
Ask for a personal
identification number (PIN). 
3. E
nter a PIN. 
4. C
heck that the user
identification is valid.
(identification is not valid see
alternative 4.1)
5. A
sk User to chose an
operation 
Elicitation Techniques Existing Systems Interviews
Brainstorming Joint Application Design Prototyping
Use Cases

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SEG3101 (Fall 2010). Requirements Elicitation Techniques
Use Case Templates – Example Template
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A. Name
: Give a short, descriptive name to the use case
•
B. Actors
: List the actors who can perform this use case
•
C. Goals
: Explain what the actors are trying to achieve
•
D. Preconditions
: State of the system before the use case
•
E. Description
: Give a short informal description
•
F. Trigger
: Describe the event that initiates the activity
•
G. Summary
: Summarize what occurs as the actors perform the use case
•
F. Related use cases
: (in accordance with use case diagram)
•
G. Steps
: Describe each step using some form (single/multiple columns)
•
H. Postconditions
: State of the system following completion
•
I. Special Requirements
: Non-functional requirements and constraints
Elicitation Techniques Existing Systems Interviews
Brainstorming Joint Application Design Prototyping
Use Cases

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SEG3101 (Fall 2010). Requirements Elicitation Techniques