8. Advantages and disadvantages of indirect sources
| Pros | Cons |
|---|---|
| Takes less time to gather than original (direct) data. | You may not know exactly where the data came from and so it may be unreliable |
| It may be cheaper to obtain than gathering original data | If you have to buy the data from a specialist company then it may be more expensive that collecting it yourself. |
| Makes extra use of original data you already have by processing for a different purpose | There may be only a small part of the data needed so you have to extract what you want from a large data set. |
| Archiving ensures that all the data you have collected is available for uses you have not considered just yet. | You may not be able to obtain exactly the data you want. |
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