... a different purpose to that which it was collected, because the investigator did not actually collect the data he/she may not know what limitations there are to the data and it may not be one hundred percent suitable for the purpose that they intend to use it for. Data can be collected by a variety of methods: 1. Direct observation - this can be expensive but is accurate. It also needs to be unobtrusive. 2. Direct inspection - this is a standard procedure done by organisations whether it is permanent or temporary. 3. Written questionnaire - this is relatively cheap. However, it has a low response rate and needs careful design. 4. Personal interviews - these are expensive but they are able to deal with complex issues. 5. Abstract from published statistics - this is cheap, easy to use but may not be directly relevant to what the organisation wants to know. To ensure that data is ...

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