Software Development Process. Basic concepts Flashcards
what is software development process?
set of related activities that leads to production of software system
does universal software process exist? why?
no, because there are many types of software systems, development teams and requirements could be very complex
why do we need software development process?
to make software development more efficient (less time and money) and standardized
what are the fundamental activities in software development process?
- software specification
- software development
- software validation
- software evolution
is software development activities simple?
no, complex, could include many sub activities (code review, unit testing)
could software development process include other activities (except fundamental)?
yes, configuration management, project planning, etc
what is software specification activity?
activity of defining software functionality and constraints
what is software development activity?
activity of software production in order to meet specification
what is software validation activity?
activity of software validation to ensure that it does what customer wants
what is software evolution activity?
activity of software evolving in order to meet changing customer needs
what is produced by software activities?
products (model of architecture or requirements specification) or deliverables (software system(s))
who is involved in software activities?
people with different roles: programmer, project manager, qa
what is software activity conditions?
set of preconditions and post-conditions that must be met before or after activity
name precondition of software development activity
software requirements specification should be approved by customer and refined by team
name post condition of software development activity
- software verification report should be approved by customer
- demo for customer
what is software process model?
abstract and high-level representation of activities and their order in software development process
what is the first software process model?
waterfall
what is waterfall model?
model that creates cascade from fundamental activities and represent them as separate phases
what is the software process model after waterfall?
incremental development
what is incremental development model?
model that group fundamental activities into recurrent groups - increments
what is output of increment?
software version
what is software version?
functionality added to previous version of software
what is integration and configuration model?
model that includes additional activities of discovering and configuring existing components and systems in order to create new one
what software process model is the best for business systems?
integration and configuration + incremental model
what software process model is the best for safety-critical systems?
waterfall with detailed analysis and specification, because mistakes could be very expensive
what software process model is the best for large systems?
use best suitable model for different parts
what is structure of activities in waterfall model?
cascade
is feedback from one activity to another allowed in waterfall model?
no, waterfall model describes linear process
what software process model is the best for embedded systems (interaction with hardware)?
waterfall, because of inflexibility of hardware
what software process model is the best for large software programs (developed by several companies)?
waterfall, because specification is needed for independent development
what software process model for unstable software requirements?
incremental, because feedback loop is shorter
is feedback from one activity to another allowed in incremental development?
yes
what is incremental approach when all system increments are identified in advance?
plan-driven incremental development
what is incremental approach when development of later increments depends on progress (customer feedback)?
agile
what software development model it the best for likely dynamic requirements?
incremental model
what are the benefits of using incremental development model?
making small steps we reduce amount of analysis, documentation and mistakes
what are the downsides of using incremental development model?
system structure degrades because of regular changes and needs refactoring
is it OK to use incremental development for complex systems?
no, framework and architecture should be stable
