system development lifecycle Flashcards
what is the system development lifecycle
a set of rules/stages that need to be followed to create a desired system
what are the 2 different types of models
waterfall and spiral models
what lis the specialist called and why is he needed
the system analyst and he is required becuae he is an expert in the area
why do the client and system analyst need to communicate properly
becuae if the system isn’t right then the system analyst may not be payed and the user wiont get the system they trequire
wat needs to be done in the problem defnition
discuss what problem is and how it can be solved
what is checked in the feasibility study
is technology available money what social affects time scale are skilled enough to run what affect will it have on the customer
what ways are there of collecting information
interviews meetings documentation questionnaires observation
what is the purpose of the analysis stage
to go through information and decide what’s relevant and what is not.
what diagrams will be produced in analysis stage to help with understanding of the present system
data flow diagrams
system flow diagrams
onceanaysis is compete what is produced and why
requirement specification and this will show what needs the system needs to do once finished.
what is the design specification
this is a sat of ideas for the new system. it lays down content and order and relationship between parts of the proposed solution. will icude how data will be stored and inputed and collected.
what difficulties are there in having a team of people produce the system
they need to co-ordinate to make sure that same variable names are not used
to solv ehtis a set of written rules and actions are written to stop this problem
what goes on in the evaluation stage
the system is tested to make sure that it meats the needs of the user and solves the problem defined by the user. this is done by testing
what goes on in testing
a test schedule produced and tests are done to make sure that inits ante met by the required outputs and results form this test are recorded and documented.
what different ways of installing the system are there
parallel
direct
phased
trial
