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Aug 17, 2022 340 likes •425 views

CSCI 2132: Software Development Norbert Zeh Software Development Faculty of Computer Science Dalhousie University Life Cycle Winter 2019 Software Development Life Cycle (SDLC) General term that describes structure imposed on the

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CSCI 2132: Software Development

Software Development  Life Cycle

Norbert Zeh

Faculty of Computer Science Dalhousie University Winter 2019

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Software Development Life Cycle (SDLC)

General term that describes structure imposed on the development of a software product Purpose:

Manage project cost
Reduce risk of missing a deadline
Ensure product quality
Prevent “scope creep”

Many models to organize the SDLC have been proposed.

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Waterfall Model

Sequential design process

Requirements analysis Verification (testing) Software design Maintenance (patches, …) Implementation (coding)

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Pros and Cons of Waterfall Model

Pros:

Natural and easy to understand
Widely used
Reinforces the notion of “design before coding”
Clear milestones

Cons:

Often not practical (too rigid)
Clients may change the requirements
Designers may not be aware of implementation challenges

(even if they are the same person)

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Rapid Prototyping Model

Gather preliminary requirements Rapid prototyping Discard prototype and develop software using formal process User evaluation of prototype

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Pros and Cons of Rapid Prototyping

Pros:

Ensures that software product meets client’s requirements
Reduce time and cost if client requests changes during the

process Cons:

Adequate and appropriate user involvement may not always be

possible

Cost of prototype development
Developer attachment to prototype

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More About Models

There are many models. Studied in Software Engineering course (CSCI 3130) Choose appropriate model depending on the particular software to be developed and client constraints.