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INF3705 summary notes chapter 1-10
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INF3705 summary notes chapter 1-10
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lOMoARcPSD|2620242Chapter 2:
2.1 Suggest the most appropriate generic software process model that might be used as a basis for
managing the development of the following systems:
A system to control antilock braking in a car
o Safety Critical System
o Plan Driven approach with requirements analysed carefully
o Waterfall model most appropriate with formal transformations between different
development stages.
A virtual reality system to support software maintenance
o Cutting edge and UI dependent for usability
o Incremental or Spiral with some UI prototyping
o Agile process may be used
A university accounting system that replaces an existing system
o Requirements fairly well known
o Reuse based approach is appropriate
An interactive travel planning system that helps users plan journeys with the lowest environmental
impact
o Complex UI which is stable and reliable
o Incremental development approach most appropriate
o System requirements will change as user experience is gained
2.2 Incremental software development could be very effectively used for customers who did not have a
clear idea about the systems needed for their operations. Discuss
Based on the idea of developing initial implementation, getting user feedback and evolving
software through several versions.
Either plan driven, agile or mixture.
Customer can evaluate systems at a relatively early stage.
2.3 Consider the integration and configuration process model shown in Figure 2.3. Explain why it is
essential to repeat the requirements engineering activity in the process.
Firstly requirements spec involve proposing initial requirements for the system
o Brief descriptions
Refinement stage, reusable components and applications discovered for refinement.
o Modified to reflect available components and system spec is redefined.
2.4 Suggest why it is important to make a distinction between developing the user requirements and
developing system requirements in the requirements engineering process
1) User Requirements describe the system functions and features from the perspective of a user. These are
usually abstract. System requirements provide a more detailed explanation of the procedure.
2) User requirements are written in plain and natural language. System requirements are more detailed
with specific specifications that could be part of a contract.
3) User requirements start with gathering information, identifying important aspects, and understanding
them.
System Requirements can only be implemented after the user requirements are understood and finalised.
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