Customer Development Design Product Development Viral 
Startup Lessons Learned
SEPTEMBER 22, 2008
I break the answer to that question down into three engines: Viral - this is the business model identified in the presentation as "Get Users." Here, the key metrics are Acquisition and Referral, combined into the now-famous viral coefficient. If the coefficient is > 1.0 , you generally have a viral hit on your hands.
Startup Lessons Learned
DECEMBER 14, 2009
I think this concept is necessary in order to answer the truly vexing startup questions, like: “Should startups charge customers money from day one?&# Let’s begin with the four customer currencies. I had a lot of use for this concept back when I worked on game design and virtual worlds. As soon as possible!&#
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Startup Lessons Learned
APRIL 7, 2010
There are often counter-intuitive changes in customer behavior that depend on little details. In fact, the curse of product development is that sometimes small things make a huge difference and sometimes huge things make no difference. Split-testing a single element in an overall coherent design seems ludicrous.
Startup Lessons Learned
DECEMBER 16, 2008
Lessons Learned by Eric Ries Tuesday, December 16, 2008 Engagement loops: beyond viral Theres a great and growing corpus of writing about viral loops, the step-by-step optimizations you can use to encourage maximum growth of online products by having customers invite each other to join.
Startup Lessons Learned
SEPTEMBER 15, 2008
This kind of result is typical when you ship a redesign of some part of your product. The new design improved on the old one in several ways, but these improvements didnt translate all the way through the funnel. Usually, I think that means youve lost some good aspect of the old design.
Startup Lessons Learned
APRIL 14, 2009
Their product definition fluctuates wildly – one month, it’s a dessert topping, the next it’s a floor wax. Their product development team is hard at work on a next-generation product platform, which is designed to offer a new suite of products – but this effort is months behind schedule.
Startup Lessons Learned
SEPTEMBER 12, 2008
vs. sustainable: Compare this to the renewable strategies, like viral marketing, SEO, widgets, and ads, which can scale into 10s of millions of users but are primarily centered around tough, non-user centric work. The Entrepreneur’s Guide to Customer Development ► June (3) What is a startup?
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