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Cost Effective - you need to make sure that the information that you are buying is worth the expense.
Timely - You need to make sure that the information is recent and isn't out of date.
Relevant - You need to make sure that the information is suitable for you subject of matter.
Reliable - Making sure that the information is from a trusted source and isnt biased in any way.
Fit-for-purpose - That infomation is relevant to your subject.
Accurate - Making sure that the information is correct and your not using incorrect information.