OO Software Lifecycles (PPT 2) Flashcards

1
Q

What is the basic development process?

A
  • Requirements Gathering
  • Requirements Analysis
  • System Design
  • Implementation
  • Component Testing
  • Integration
  • System Testing
  • Installation
  • Maintenance
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2
Q

What is the waterfall approach?

A

It is a very strict approach where each step of the development cycle is followed to completion before moving onto the next

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3
Q

What can change during the design and analysis approach?

A
  • Customers change their mind
  • Change to environment, such as new technology or laws changing
  • Misunderstood the requirements so have to go back
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4
Q

What is late design breakage?

A

This is when the process of integrating and testing finally begins, major unforeseen and undetected problems arise, causing a delay in the planned end date and work being redone.

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5
Q

What is a incremental, iterative, risk driven approach?

A

This is when the process is done in cycles, with smaller versions of the system being constantly developed and then evaluated.

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6
Q

What are the steps in one cycle of the iterative approach?

A
  • Planning
  • Risk Analysis
  • Analysis, Design, Implementation, etc
  • Evaluation

Each cycle usually lasts between 2-6 weeks

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7
Q

How can each Iterative cycle be described?

A

As a mini-waterfall approach

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8
Q

What are some differences between Waterfall and Iterative approaches?

A
  • A section is fully completed before moving on in waterfall whereas everything has smaller but more even increases in an Iterative approach.
  • Each iterative cycle is a mini waterfall
  • Iterative promotes early design breakage whereas Waterfall promotes late design breakage
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9
Q

What are some aims of the iterative approach?

A
  • Accommodate changing requirements
  • Serious misunderstandings are made evident early as the highest risk issues are dealt with at the beginning.
  • Training element for people as everyone begins work early
  • Gives a competitive edge as reduced functionality version can be released sooner to guard the market
  • Build confidence and credibility in the system as users can see it working
  • More realistic assessment of project status as you can see the progress with each system
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10
Q

What are Agile methods?

A

They are very ‘radical’ practices which aim to make the customer a part of the team. This includes test-driven development and continuous integration, as well as pair-programming

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11
Q

What are some Agile principles?

A
  • Embrace changing requirements to meet user’s needs
  • Deliver software early and often
  • Value working code over comprehensive documentation
  • Favour communication and collaboration over following a prescriptive process
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12
Q

Which method is better?

A

There isn’t a method which is better, cannot use a one size fits all approach. Both have benefits for different systems.

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