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886647
ICT UNIT 3
Description
Mind Map on ICT UNIT 3, created by Ellie Dukes on 16/05/2014.
Mind Map by
Ellie Dukes
, updated more than 1 year ago
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Created by
Ellie Dukes
about 10 years ago
33
2
0
Resource summary
ICT UNIT 3
Encoding Data
Saves time
encoded data is quicker
Less storage space
Fewer characters
Faster
Less chance of human typographical error
Storing data using ICT
Advantages
Cheaper
Less money spent on overheads
No filing cabinets
Easier and quicker to transfer and back up data
Disadvantages
Training will be needed
Expensive
Transferring data is a security risk
Protection is needed from hackers
Validation and Verification
Batch Total
Checks something isn't missing
Adding together a number field in different records and checking totals
Invoice adding 1,2,3 the computer will look for a BATCH of 6
Hash
Same as Batch but field checked is meaningless
Company has 3 customers with numbers ending in 2, 3, 4. Computer looks for a hash total of 9
Validation
Only sensible data entered
Verification
Errors when copied form one medium to another
Double Keying
Data Entered twice
Passwords
Visual Check
Proofreading
Looking over a CV before sending
Parity
Checks that data is correct when sent
Uploading files to a website
Transcription
Erros occur when copying data to computers
Bad Handwriting
Transposition
Errors can happen when characters are swapped
Pressing 'Q' instead of 'W'
Control Systems
Security Systems
PIR sensors
Automatic Doors
Traffic Control
Car Parking
Greenhouses
Robotics
Stimulation
Data Logging
Advantages
More Accurate
No-one will forget a reading
Disadvantages
Equipment can be expensive
Could go wrong
Control Systems
Advantages
Robots can be put in dangerous situation
Don'y need to take breaks
Disadvantges
Human jobs lost
Expensive to repair
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