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Software process
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Set of related activities that leads to the production of a software product.
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4 steps of software engineering
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1. Software specification
2. Software design and implementation 3. Software validation 4. Software evolution |
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It got obsolete since 1970, when programs increased their complexity.
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Code & Fix
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Code & Fix
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-Receiving general specification's.
-Coding -Identifying errors -New requirements -Frustration -Repeat |
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Why to use Software processes
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Used by software industry to design, develop and test high quality softwares that meets or exceeds customer expectations, within time and costs estimates
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Software specification
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The functionality of the software and constraints on its operation must be defined and described.
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Software design and implementation
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The software to meet the specification must be produced.
-Define algorithms, languages, databases. -Start coding |
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Software validation
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The software must be validated to ensure that it does what the customer wants, that it meets the requirements.
-Find errors |
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Software evolution
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The software must evolve to meet changing customer needs, as well as maintenance.
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Plan-driven
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All activities are planned in advance and progress is measured against this plan
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Agile
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Planning is incremental and it's easier to change the process to reflect changing customer requirements.
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Software specification steps
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1. Feasibility study
2. Requirements elicitation and analysis 3. Requirements specification 4. Requirements validation |
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Software design and implementation steps
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1. Architectural design
2. Interface design 3. Component design 4. Database design |
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Software validation steps
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1. Development testing: each component is tested independently
2. System testing: integration of components and testing 3. Acceptance testing: the system is tested with data supplied by the customer. |
