Computing Quiz Systems Life Cycle F451

Questions on the Systems Life Cycle F451

(Stages can be a little different depending on what you learnt)

Had no idea the quiz was a multiple choice one so I guess it is just an informative revision card now. Oops!! I'll bear this in mind when I do my next one...

And the quiz muddled up my question order, mine was a lot more chronological :/

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What are the 9 stages of the System Life Cycle?
Definition, Analysis, Design, Implementation, Testing, Installation, Evaluation, Documentation, Maintenance
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What happens in the Definition Stage?
Problem is Defined, why is there going to be a new system?
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What happens in the Analysis Stage?
System requirements are established. Investigations take place, Questionnaires, Observations, Interviews. What should the specifications be? Feasibility Study.
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What is a Feasibility Study?
TELOS: Technically (Is it possible), Economically (Can we afford it, within the budget?), Legally (Abide by laws? Health and Safety?), Operationally (Will it work with rest of company?), Socially (Affect on employees? Training, Job loss?). Time
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What happens in the Design Stage?
All individual parts and relationships are designed. All processes and methods of storing data are designed, maybe with diagrams. GUI layout designed. Design needs enough detail, the developer can pick it up and follow without assistance of analyst.
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What happens in the Implementation Stage?
Codes are written and new system begins actually developing. Prototypes are made to see what system can do so far.
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What are the 2 types of Prototypes?
Evolutionary and Throw-Away. Evolutionary=Prototype is tested, kept and improved upon. Throw-Away=Prototype is tested, feedback recorded then start from scratch. Output is completed system.
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What happens in the Testing Stage?
Remove bugs, assess if it meets the specifications, try to break the system by using normal, extreme and erroneous data, log tests, fix bugs and deliver
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What happens in the Installation Stage?
Parallel=Old and New run same time then switch at night (time consuming) Pilot=Trial version (only if worried new system will die) Phased=New system gradually phased in (time consuming) Direct= Switch old to new (risky, testing needs to be perfect)
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What happens in the Evaluation Stage?
Compare what has been made to what was planned, does it solve problem?
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What happens in the Documentation Stage?
Documentation (Doc) allows it to be maintained and developed. The two types of doc made, User and Technical. User Doc is for primary user and will contain instructions. Technical Doc will be for I.T. technicians so they can fix it if it goes wrong.
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What are the 3 types of Maintenance?
3 types; Perfective (more features added, such as updates, to make it better), Corrective (bugs are fixed), Adaptive (System adapts to external changes, e.g. VAT increase where the algorithm needs to change to accommodate for the increase)
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Other cards in this set

Card 2

Front

What happens in the Definition Stage?

Back

Problem is Defined, why is there going to be a new system?

Card 3

Front

What happens in the Analysis Stage?

Back

Preview of the front of card 3

Card 4

Front

What is a Feasibility Study?

Back

Preview of the front of card 4

Card 5

Front

What happens in the Design Stage?

Back

Preview of the front of card 5
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