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Re: Total cost of Ownership


I'm sorry about the delay replying. It was difficult to separate cosign development/community support from running the weblogin server & supporting campus. Running our actual servers is greatly simplified by our use of Radmind <>.

The time spent running, monitoring, and maintaining the weblogin servers and gathering usage statistics is slightly less than an hour per week. This is our only fixed cost.

Signing CSRs for CoSign services takes about ten minutes per request. Apache users are basically self-sufficient: we get an e-mail message from them asking for a service name and that's basically the first we hear from them (and the last). IIS users have, thus far, required slightly more support, but I believe that has changed since the IIS filter reached 1.0. There is also time spent per week getting the word out about CoSign on campus. These costs are approximately linear with the number of users we interact with. Some users take a couple of minutes to get started, some take a few hours. We spend between 2 and 4 hours per week supporting campus users. We're pretty big (>100,000 users) and decentralized, though, so YMMV.


On Apr 5, 2004, at 10:10 PM, Brett Lomas wrote:

Hi Kevin and others

I am just evaluating what the Total Cost of Ownership would be for CoSign if deployed within the UoA. Can I get an estimate on the number of hours you all spend doing day-to-day maintenance on the system? This would include support, patching and upgrades etc but not bug fixing and development? Just a rough number of person hours per week would be good.

Many thanks



Brett Lomas

Integration Architect

Information Technology Systems and Services

The University of Auckland

New Zealand

Phone:          +64 9 373 599 extn 86499

Mobile:         +64 21 757 096


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