LEARNING OBJECTIVES:
The specification states - you should be able to:
distinguish between data, information and knowledge by using examples;
describe how the quality of the information produced can be affected by the following factors: accuracy, relevance, up to date/currency, completeness, presentation and reliability ;
Data is raw facts and figures with no meaning or context.
Example, 150 is just a sequence of digits
Information is data which has been processed and given a meaning or context.
Example, 150 is a Customer ID.
Knowledge is the applying of rules to information to make a decision .
Example, Product 45667 needs re-ordering.
Factors affecting the Quality of Information
Accuracy- The information must be correct and be up-to-date with no mistakes made.
E.g. bank statement must be accurate.
Minor inaccuracies can lead to poor quality decisions being made.
Complete – All data must be entered and not left blank.
Information should include all the data which the user needs to make their decision.
Example – an answer to a question may have been omitted, this would mean that something would be missing from the information produced. Therefore, it will be difficult to analyse or make a decision.
Effectively Presented – The data must be laid out properly and be easy to understand.
For example information about sales trends in a business would be more effective if a graph is used rather than a text document.
Information should be set out in a clear, accessible format and communicated in a manner that is appropriate for the user.
Example – Terminology on report must be understandable.
Reliable - Is the source of the information reliable?
The information has been verified and deemed trustworthy.
If information comes from a direct source it is more likely to be reliable than information from an indirect source.
For example if information is used for a specific purpose it could be more reliable than if it is used for a different purpose or than originally intended.
Up-to-date - Is the information up-to-date?
For example if a school does not update pupil addresses for 5 years then some pupils may not get their school report if they have recently moved house.
A report on stock levels will not be up-to-date if it is used to re-order stock two weeks later.
Relevant - How relevant is the information for its use?
For example Key Stage three grades may not be relevant for a University application form.
Information should not include data that has no bearing on the user’s informational needs.
Too much information could lead to “information overload”.
Example – a manager asks for details of one client’s account and receives a report with all clients’ details on it.
Data, information and knowledge questions will always ask you to refer to the question. Therefore, make sure to reference examples provided in the question.
Factors affecting the quality of information questions may list one example in the question and ask for others, so be careful not to state the one already in the question.
If a question give two marks for explaining one factor that affects the quality of information make sure and explain an example of this. Don't waffle either, make sure to have one example per factor learnt well before the exam.