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39 Cards in this Set
- Front
- Back
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what is a database?
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A shared collection of logically related data
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what is the difference between data and information?
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data is raw and information is derived from data
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what problems are there with old file based systems?
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data dependance
duplication of data proliferation of applications separate and isolated data incompatibility of files fixed processes |
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what is a file?
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a physical location to hold data
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what SDLC's do you know?
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waterfall, v model, prototyping, spiral
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describe waterfall model
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clear delineated tasks.
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describe spiral model
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risky
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describe v-model
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testing
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describe prototyping
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repetition
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what tasks are done in a projects lifecycle?
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conception
feasibility project initiation analysis specification design implementation integration and testing cut over/installation project close style maintenence |
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what is the problem domain?
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the area in the business that requires the new system
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what is the scope?
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what is the (feasibility) study going to look at?
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what is a feasibility study for?
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determine whether to go forward with the project or not
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what does one need to consider while conducting a feasibility study?
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technical
economic operational schedule political legal contractual |
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what do you do during the analysis phase?
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scope definition
requirements analysis examine documentation interviews surveys |
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what are stakeholders?
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one with a vested interest in the outcome of the project
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what are the advantages of examining documentation?
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facts and figures are easy to find
gives history of issues with a clear audit trail shows how procedures should be done |
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what are the disadvantages of examining documentation?
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there is too much data
not all of it is useful the material cannot be questioned unlike people often out of date can be difficult to access |
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what should one do at the start of an interview?
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shake hands
introduce oneself explain the purpose of the interview check recording equipment take notes |
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what should one do during an interview?
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take responsibliity for the agenda
use different kinds of questioning to get different kinds of information do not let it become a moan and groan session listen to what is said make sure you understand what is said collect examples of documents recording |
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what should one do after an interview?
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thank the interviewee
make another appointment if deemed necessary write up notes ASAP if appropriate provide notes for interviewee to check |
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what is shadowing/observation?
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following people and observing how they do their job
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what is sampling?
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using a small part of a large population
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what is the Hawthorne effect?
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people behave differently when being observed
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what is a functional requirement?
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an action that the proposed system needs to be able to take something that can be drawn and recorded
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what is a non functional requirement?
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A property that the eventual product must have. A characteristic or constraint that might limit our choice of technology when we implement one or more functional requirements
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what does FURPS stand for?
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functional
usability reliability performance security |
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what is a DFD?
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A diagram to show how data is captured, processed, stored and distributed within a system
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what is the curved box mean in a DFD?
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process: actions performed on data so that they are transformed, stored, or distributed
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what does an arrow mean on a DFD?
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data flow: result of a query to the database
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what does a rectangular box with the line closer to the left mean on a DFD?
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data store: a physical location to hold data (file folder notebook or database)
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what does an oval mean on a DFD?
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sourse/sink: origin or destination of data also known as external entities
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what do u put a decision table where?
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top : conditions and condition alternatives
bottom: actions and action entries |
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what is a decision tree?
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Pictorial representation of alternative conditions which use nodes and branches to show the consequences of various alternatives
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what is an algorithm?
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a step by step list of instructions/ psudeocode/ structured english
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what techniques are given to decompose a system?
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user goal and event decomposition
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what is a use case diagram?
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a diagram used to view a decomposed system
(user goal or event decomposition) |
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what is an actor on a use case diagram?
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a stick figure representing a person using the system
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what does a strait line mean in a use case diagram?
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it connects actors to circles in order to show which actors participate in specific tasks
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