I would say it depends on what you are testing. For instance, right now, I am testing the process a user would go through to subscribe and unsusbscribe to an e-newsletter via email. Since I have over 7500 customers on my invite list, I am mimicing that list with internal employees around the world who have different email clients and different systems. So, I sent out a prototype email about it all to 15 internal employees. But, it all depends what your target is, and what the material is. -ari -----Original Message----- From: Shirley Kaiser, SKDesigns [mailto:skaiser at skdesigns.com] Sent: Tuesday, January 23, 2001 8:54 AM To: thelist at lists.evolt.org Subject: Re: [thelist] How long is a usability piece of string? Martin, Jakob Nielsen, a usability expert (although controversial for his strong opinions!) says you can do fine with 5 people for user testing. There's an article about it at his site at http://www.useit.com. Personally, I try to get as many people as possible, usually at least 5-10 or so, depending on how lucky I get for people to do this. I also try to get people of varied levels of experience using the Internet to attempt to get a good cross-section. If it's a specific target, then I tend to tune in closer to the type of target model. If we discover bumps to adjust, then I do another round after I've changed things, too, of course. I'll be curious to hear what others do. What do you think is reasonable? Warmly, Shirley -- Shirley E. Kaiser, M.A. SKDesigns mailto:skaiser at skdesigns.com Website Development http://www.skdesigns.com/ Pianist, Composer http://www.shirleykaiser.com/ At 05:37 AM 01/23/2001, you wrote: >Here's question for you: > >How many person/days would you expect a credible usability >workstream to take for a reasonably large site (would typically >include both product and non-product info, and shopping)? > >Cheers >Martin --------------------------------------- For unsubscribe and other options, including the Tip Harvester and archive of TheList go to: http://lists.evolt.org Workers of the Web, evolt !