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Discovery & Ideation

Question Evidence
What problems do people have?
What types of people have those problems?
How are they currently solving the problem?
What sucks about the solution?

Validation

Question Evidence
How many people are facing the identified problem?
How interested are they in a solution to the problem?
How valuable is a solution? How much are they willing to pay?
How well does the proposed solution line up with their needs and wants?

Prototyping

Question Evidence
How well do these designs hold up the promise of the proposed solution?
How close are we to this solution being ready?
What nuances come up when users interact with the proposed solution?
What assumptions are users making based on the proposed design?
Which features are most important? Most urgent?

Implementation

Question Evidence
How do practical limitations impact the experience?
What tradeoffs are acceptable?
How does the solution interact with the broader ecosystem?

Marketing & Launch

Question Evidence
Who is more interested in this solution?
How do they learn about new products, services, technologies, etc?
How easy is it to adopt our solution? Where are people falling out of our conversion funnel?
How flexible and scalable is the solution? Does it apply to a variety of use cases?

Maintenance & Iteration

Question Evidence
How are people using this solution in real life? How well does it fit into their workflow?
What are the most popular features? the least?
What are the most common feature requests?
Where are people getting stuck? Why is that happening, and how do we fix it?

End-of-life

Question Evidence
What are the existing alternatives available for this solution?
What transition costs are associated with moving to a different solution?
What support will customers need to make the transition?
How much time do they need to plan and execute a migration?