1. Cost incurred per search Users’ efforts involved in
Learning how to use the system
How it works
Getting docs from backup doc. delivery system
Users’ time
From submission of query to the retrieval of references
From submission of query to the retrieval of the actual information

2. Metadata
Recall / Precision
Time lag, response time
Learning curve
Search features
Form of presentation – banner? Layout? Integrity? Consistency?
Linkages – link to external site? Or ..
Navigation
Coverage of the collection
Usability – appropriateness for intended user?

3. National Electronic Library for Health at http://www.nelh.nhs.uk
Thesaurus available? e.g. anaemia, anemia ; high blood pressure, hypertension ; "aspirin" might be a better option than "NSAIDS" ; general practitioner", "family physician"
Phrase search by Default
NO stemming
Search by metadata
Collection rich? (try fever, flu ; how many hits?)
How does the web site collect information?

4. Display results by category
No. of records per page = 10 (customizable?)
Relevancy? (I don’t know!!)
Currency? (try bird flu)
The data fields?
Full-text available?

5. Combined Health Information Database at http://chid.nih.gov
Full-text available?
Search operators .. e.g. adj
Phrase search?
Thesaurus?
Stemming?
Help text/guide is enough?
Presenation? (old-fashioned!)
Sorting?
Bibliographic database!