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DATA (Quality (Accuracy (Questionnaries, Human error, Calibration of…
DATA
Quality
Accuracy
Questionnaries
Human error
Calibration of instruments
Revelance
Age
Completeness
Presentation
Details
Types
interger
whole numbers
Boolean
Two values
True/False
0 1
Real
Decimal numbers
String
Alphanumeric
Date/Time
Sources of data
Original source data
Collection
Face to face
Questionnaries
Observation
Advantages
Extra data
Reliable
Sell
Disadvantages
Time
Expensive
Equipment
Indirect data
Used for another purpose
Re-used
Advantages
Fast
Cheap
Extra use
Disadvantages
Unreliable
Expensive
Useless
Archived
Advantages
Safe
Cheap
Disadvantages
Slow location
Lost
Static informacion sources
Advantages
Realiable
Offline
Distributed
Disadvantages
Lost
Slow
Expensive
Limited
Dynamic Information Sources
Advantages
Quick
Inexpensive
Easy finder
Free content
Disadvantages
Mistakes
Online
Conflicting info
Biased
Coding
Advantages
Speed data entry
Accuracy
Validation
Less storage
Fast
Disadvantages
Coarsening
Obscure the meaning
Value judgments