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ICT AS Revision Notes


ICT AS REVISION NOTES (WJEC COURSE)
Topic 1 ­ DATA, INFORMATION AND KNOWLEDGE

Key terms:

Data: Raw facts and figures that have no meaning until they have been
processed.
Information: Information is data that has been processed and given a context
that provides meaning.
Knowledge: Knowledge…

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ICT AS Revision Notes


The importance of up-to-date, accurate, and complete information:

Up-to-date

Information should always be date stamped so that there is no danger of using out-
of-date information. If the information is personal information, there is actually a legal
requirement under the Data Protection Act that the information…

Page 3

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ICT AS Revision Notes


Topic 3 ­ QUALITY OF INFORMATION

How can information improve the quality of decision making?

Management decisions are based on information ­ the information needs to be high
quality for those decisions to be good ones.

The quality of the information can be measured by:

-…

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ICT AS Revision Notes


- Directories
- Maps
- Invoices
- Reports
- Letters
- Newspapers
- Journals
- Manuals

Topic 4 ­ VALIDATION AND VERIFICATON

How can data errors occur?

Processing of incorrect data can lead to ridiculous and embarrassing outputs.

Errors can take time and effort to sort…

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ICT AS Revision Notes


Double entry of data is where two people use the same data source to enter the
details on to the ICT system. The system will compare the two inputs and only if they
are identical will they be accepted. However this has larger costs (as more…

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ICT AS Revision Notes


- Operating system
-
o Some packages will not run on older OS's such as Windows XP
- Communication
o Anyone in an organisation involved in working with a new system
should be consulted and involved in its development.
- G.I.G.O (garbage IN, garbage OUT)
o…

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ICT AS Revision Notes


- Post-implementation
o Once a system has been implemented users cannot be left to get on
with it
- Maintenance
o Systems need to be maintained so they function correctly.
- Cost
o Cost is always a limiting factor (will limit; time to spend developing
hardware/software…

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ICT AS Revision Notes


Features:

- Computer (runs off a computer)
- CAD
- Automatic
- Re-usable

Advantages:

Costs are less (cheaper)
Much faster
Better quality and more consistent

Computer-based shopping systems

The retail environment has been changed dramatically by e-commerce.

EFT (electronic funds transfer)

Relates to the payments of…

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ICT AS Revision Notes


Stolen credit cards may be used ­ seller must bear cost of this
Must be procedures in place to protect privacy of customers'
data
Expensive to set up payment systems

Stock control systems

Bar codes

Online shopping

E-commerce examples
o Online marketing
o Electronic funds transfer…

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ICT AS Revision Notes


Typically, a CAL package might contain:

- Tutorials
- Simulations
- Animations
- Drill and practice
- Tests
- Games

Computer based training (CBT) uses ICT systems for training in the workplace,
usually on a PC or portable device. It can be used for:

- Health…

Comments

Joel

is this for the as course?

Josh Piggott

Shut up Joel

Tyler Edwards

Shut Up Piggot

connor

Shut up Edwards


Sanjay Dayal

some topics missing

Phoebe-rose Burris

Home Entertainment is missing!

JonniOk

Shut up connor

crab_king

shut up jonni

AnaRita17

Not bad

AnaRita17

Just Topic 7,8,10,11 and 12 are missing

jamjortur

Shut up Ana

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