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[0] documentation review [1] when want impression of how program operates without interrupting the program; is from review of applications, finances, memos, minutes, etc. [2] -get comprehensive and historical information -doesn't interrupt program or client's routine in program -information already exists -few biases about information [3] 
-often takes much time -info may be incomplete -need to be quite clear about what looking for -not flexible means to get data; data restricted to what already exists
Basic Guide to Program Evaluation (Including Many Additional Resources)
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