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112200
Waterfall Model
Descrição
A Level ICT (Unit 3.3) Mapa Mental sobre Waterfall Model, criado por scott.dowle em 28-05-2013.
Sem etiquetas
ict
unit 3.3
ict
unit 3.3
a level
Mapa Mental por
scott.dowle
, atualizado more than 1 year ago
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Criado por
scott.dowle
aproximadamente 11 anos atrás
228
1
0
Resumo de Recurso
Waterfall Model
Features
Sequence of distinct phases
1 stage must be finished before moving onto a next phase
Deliverables at end of each stage used to ensure progress
If error is found during a stage then previous stages may need to be reworked
Stages
Analysis
Help Systems Analyst define requirements
Questionnaire
Observation
Interview
Document Inspection
Discover the data, volume of data, information, users & roles, problems with current system
Design
Solution defined
Data to be processed specified
Input, Processes & Format of Output defined
Hardware & Software requirements
Testing strategies defined
Development & Testing
Unit Testing
Testing each field, button etc. for validation
Person who wrote code
Integration Testing
All code functions together
Construction Team
System Testing
Actual data if used in real situation
Under supervision of Systems Analyst
Types of Test Data
Extreme
On Boundary
Valid/ Normal
Within Boundaries
Exceptional
Doesn't follow rules but valid e.g. 29th February
Invalid/ Erroneous
Not Acceptable
Implementation
Parallel
Old & New side by side
Safer
More work
Phased
Part I complete before Part 2
Safer
Long
Direct
New system starts on set day
Faster
Stressful, No fall back
Pilot
Installed in one branch
Train other staff, identify problems
Takes Time
Review & Maintenance
Corrective
Small issues after installation
Adaptive
Due to external factors e.g. VAT change
Perfective
System in place for some time but some small tweaks identified
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