9 Questions
Which software development approach requires planning and scheduling of all process activities before starting work on them?
Waterfall model
How many separate identified phases are there in the Waterfall model?
5
What is considered the main drawback of the Waterfall model?
Difficulty of accommodating change
In which software development model does each phase only begin when the previous phase is complete?
Waterfall model
When is the use of the Waterfall model most appropriate according to the text?
When requirements are very well documented, clear, and fixed
Which phase of the Waterfall model involves system and software design?
Implementation and unit testing
What is a key characteristic of projects where the Waterfall model is most appropriate?
Short projects
Why is accommodating change considered difficult in the Waterfall model?
Phases must be complete before moving on
What type of process does the Waterfall model exemplify?
Plan-driven
Study Notes
Software Engineering Ethics
- Respect confidentiality of employers or clients, with or without a formal agreement.
- Do not misrepresent level of competence or accept work outside of competence.
Intellectual Property Rights
- Be aware of local laws governing intellectual property, such as patents and copyright.
- Protect employers' and clients' intellectual property.
Computer Misuse
- Do not use technical skills to misuse other people's computers.
- Misuse ranges from trivial (e.g., game playing) to serious (e.g., disseminating viruses).
Software Development Life Cycle
- A software process is a set of activities leading to software production.
- Processes involve stages that produce tangible items and allow for review.
- Goals of each stage: define clear steps, produce a tangible item, allow for review, and specify next actions.
Software Process
- Fundamental activities: software specification, design and implementation, validation, and evolution.
- Software specification defines functionality and constraints.
- Software design and implementation produces software meeting the specification.
- Software validation ensures the software meets customer needs.
- Software evolution adapts to changing customer needs.
Software Process Descriptors
- Descriptions include activities (e.g., specifying a data model), ordering, products, roles, and pre- and post-conditions.
Process Models
- Models categorized as plan-driven or agile processes.
- Plan-driven processes plan all activities in advance and measure progress.
- Agile processes plan incrementally and allow for easier change.
- No ideal software process; most practical processes combine elements of both.
Traditional Software Process Models
- Waterfall model: a plan-driven process with sequential phases.
- Waterfall model: requirements analysis, system design, implementation, integration, and operation phases.
- Main drawback: difficulty accommodating change.
- Appropriate situations for waterfall model: short projects, well-documented requirements, and available resources.
Test your knowledge about software engineering ethics, focusing on topics like confidentiality, competence, and intellectual property rights. This quiz covers important ethical considerations for software engineers.
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