A Level Computer Science Paper 1: 1.2.3 Software Development - Lifecycle
This flashcard set explains the Software Development Lifecycle as a circular process consisting of five key stages: analysis, design, implementation, evaluation, and maintenance. It emphasizes how analysis gathers system requirements and produces documentation to guide the rest of the development.
What is the software development lifecycle
5 stages, all shown as a circle
Analysis, design, implementation/development, evaluation, maintenance
Key Terms
What is the software development lifecycle
5 stages, all shown as a circle
Analysis, design, implementation/development, evaluatio...
Analysis
System analysis gathers information about what the current system does if there is one and what the new system needs to do
Uses questionnaires, ...
Documentation of analysis
A document usually called something like “system specification” or “user requirements”
Used to create and evaluate the design
Design
Includes: A description of the data, database design, input screens, output screens, how the data will be processed, how the software will be teste...
Implementation
Coding and testing the software, writing user and technical documentation and installing for the users
What stage is testing in?
Implementation
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| Term | Definition |
|---|---|
What is the software development lifecycle | 5 stages, all shown as a circle Analysis, design, implementation/development, evaluation, maintenance |
Analysis | System analysis gathers information about what the current system does if there is one and what the new system needs to do |
Documentation of analysis | A document usually called something like “system specification” or “user requirements” |
Design | Includes: A description of the data, database design, input screens, output screens, how the data will be processed, how the software will be tested |
Implementation | Coding and testing the software, writing user and technical documentation and installing for the users |
What stage is testing in? | Implementation |
Black box testing | By a different organisation Carried out independently of the code written, checks each input for the correct output |
White box testing | By the developer As they are coding, each path through the code is trialled at least once. Testing the quality of the algorithms |
Alpha testing | Carried out by the developer’s in-house team Looks for errors and omissions and checks that it works |
Beta testing | By a small number of potential users They agree to use the software and report any faults, may try things the developer didn’t anticipate |
Evaluation | Every aspect of the software is checked to make sure it does what it is supposed to |
Corrective maintenance | Fixing bugs that have been found after release |
Adaptive maintenance | Adapting the software to meet the changing needs and requirements |
Perfective maintenance | Continuing to try and improve the software even though it is working well |