A Student Guide to Object- Orientated Development

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A Student Guide to Object- Orientated Development
Chapter 2 Requirements for the Wheels case
study system
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Requirements engineering

• Three main stages
• elicitation
• specification
• validation

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Requirements engineering

• Elicitation
• Information is gathered
• relating to the existing system
• current problems
• requirements for the future

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Requirements engineering

• Specification
• When the information that has been collected it
  is
• ordered
• documented

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Requirements engineering

• Validation
• The recorded requirements are checked
• to ensure that they are consistent with what the
  clients and users actually want and need.

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Requirements elicitation interviews
It is useful to have an interview plan
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Requirements elicitation interviews
Bike card example of source document
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Requirements elicitation questionnaires
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Requirements elicitation scenarios
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Requirements elicitation scenarios
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Requirements specification

• Purpose is to collate, order and record
  information gathered during the elicitation stage
• Examples the Problem Definition, the Problems
  and Requirements List

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Requirements specification Problems and
Requirements List
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Requirements validation
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Requirements for the Wheels system