ICT AS Level - Topic 3 Quality of Information

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  • Created by: Dan 8888
  • Created on: 31-03-15 15:38

How Info can Improve the Quality of DM


Accuracy - Credit card statements must have the right rate of interest applied to the balance or the customers will complain

Relevance for a particular use -Breakdown of royalties for each month over last 3 years but given total royalties for each year -> Seasonal variations can't be seen!!!

How up-to-date the information is - Information should be date stamped because using out-of-date information can lead to many issues like bills being sent to the wrong address

The completeness of information - Customer may ring up and order goods and the salesperson may say that they will be delivered the next day however the salesperson may not have a stock list which means they have incomplete information

How easy the information is to understand - Meaning of information should be clear and any abbreviations/codes should be explained

How well information is targeted - Information needs to be targeted at the person who is going to use it e.g. lower levels of management require more detailed information

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How much user confidence there is in the information - Sometimes a user finds some part of information which they know is wrong which leads to them being suspicious about the remainder of the information e.g. the system may inform the user that there are five items of FIFA 15 in stock when the user knows that there are only two items -> Leads to no trust in the system and they would rather go and check themselves

The Importance of Keeping Data Up-to-date:

- Requirement under DPA 1998 for anyone who processes personal data to keep it accurate and up-to-date

 - Companies which keep details of people who have moved house, have deceased, have asked not to be sent unsolicited mail, have never responded to a mail-shot

 - Where data comes from -> Moving details come from utility companies who are contacted with the new address details when people move, deceased data comes from Registers of Births, Marriages and Deaths, people who do not want to be sent mail-shots comes from a database set up by the Mailing Preference Service (MPS), data concerning people who have never responded to a mail-shot comes from all the companies who send mail-shots who pool this information together.

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Processing Huge Amounts of Data

- Within hours of the terrorist attack on the London Underground on 7 July, police were gathering huge quantities of data which included CCTV footage, mobile phone records and witness statements

 - Managed to process the data and they arrested the people who were involved

 - Processing huge quantities of data needs a powerful computer with sophisticated software

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How to Find Information

On-line Information Sources:

Intranet - Used to allow information to be shared and users can use web browser software to access data in any database which the organisation wants to make available e.g. stock information

Internet - Lots of information can be accessed on the Internet and lots of companies subscribe to on-line services that provide them with the information that they require e.g. travel agents have access to flights + holidays which aren't available to book direct - Examples of information from the Internet - Tax information, Information about the DPA and other laws, details of utility suppliers + their costs, research into competitors' products or services and information form government's National Statistics Office


 - Information cannot be changed and they hold lots of information

 - Used less often for distribution of large quantities of information as the majority changes and it is easier to access it on-line

 - Examples - CD from Royal Mail which has full listing of UK addresses, updated quarterly

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Non-ICT Sources of Information:

- Not always computerised -> Doctor's surgery has lots of paper files due to the fact that there was a time where patient details were not computerised and transferring them onto a computer does take a long amount of time -> There are smaller businesses which don't use computers maybe because the owners are of an older generation and cannot be bothered or maybe because the system works well and doesn't need changing

 - These include reports, newspapers, letters, maps, paper invoices etc.

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