ONLINE-ADS>> Measuring sessions

bruce_at_sprintlink.co.za
Thu, 20 Feb 1997 23:33:00 +0000

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Deloittes/Touche has positioned itself in South
Africa as the leading Web audit firm.

As part of their audit they attempt to establish the number of "visits"
to a site by using a 30 minute session interval between page
requests emanating from any unique host.

It's an attempt to aggregate the number of visitors to any Web site,
but they carefully don't call it that.

One of the sites I work with garnered 300 000 page requests last
month, and the DeLoittes session measurement translated that into 100
000 "visits".

Sounds feasible but I don't think it's especially
useful and may well understate the numbers, especially in a country
where there are only a few major ISP's whose dynamic IP addresses
may be used over and over in a short period of time.

I'd be interested to hear from others who have experience with site
audits about what measures are being used by the auditors and whether
there's a better
way to get a sense of audience numbers than thumbsucking a session interval.

The other thing that concerns me is that the number of "domainless" IP
addresses reflected in the
log files of some of our bigger sites is as high as 25%. This really
stuffs up the measurement process. It's akin to a newspaper having a
quarter of its sales through unknown newsagents.

Are these figures typical in the USA and other countries?

Tks

Bruce Cohen
Nexodus

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