What Is Lean Inception?
Agile projects are about delivering valuable software early and continuously, but they still need some up-front work. That's where an inception comes in: a short, focused activity at the start of a project where the team gathers to align on direction and working style. A lean inception compresses this into a single week, helping the team understand the key features, identify customers, and create a canvas to define the characteristics of a Minimum Viable Product (MVP).
The approach was designed by Paulo Caroli, an Expert Inception Facilitator at Thoughtworks, who has spent over two decades helping organizations build digital products across Brazil, India, the USA, Latin America, and Europe. He is also the author of the book Lean Inception: How to Align People and Build the Right Product.
From Weeks to One Week
At Thoughtworks, inceptions have been part of agile projects since around 2004. Originally developed by Luke Barrett, these sessions brought the project team together for two to four weeks of activities before delivery work began, generating alignment between business and technical people and producing an ordered list of estimated user stories with a release plan.
Caroli facilitated these longer inceptions until a personal constraint changed things: after his son was born in 2011, he couldn't spend weeks away from home. He needed to make inceptions leaner — short enough to fit in a week. On a flight from São Paulo to San Francisco, he read Eric Ries's The Lean Startup, which gave him the justification to cut the timeline and a new name for the resulting workshop.
Why Lean Inception?
The shift from the traditional inception isn't just about duration. It's about focus and outcome:
- The shorter format removes everything not related to the product itself — architecture, project management, and other concerns — making the session lean.
- The outcome is an understanding of the MVP, a core concept from the Lean Startup movement.
These two factors drove the name: The Lean Inception.
When to Use It
A lean inception is valuable when a team needs to iteratively develop an MVP. The central property of an MVP is that it's built to learn — to test assumptions about what's valuable to users before deciding whether to continue building the product. That means the team needs to know who the users are, what activities the product supports, and how to measure whether it's actually useful to them.
The workshop is particularly useful in two circumstances:
- Large projects can use it to start quickly and work in a lean style, with early iterations designed to discover and test which features users truly value.
- Smaller organizations and startups can use it to take an idea already validated by pre-software MVPs (such as mockups or concierge tests) and evolve it into an actual software product.
It's important to note what the lean inception doesn't cover: it isn't a substitute for ideation sessions, customer research, architectural review, or competitive analysis. It's one focused technique for understanding MVP scope, and how it fits with other activities depends on your organization's context.
Recommended Timetable
The lean inception runs as a series of activities spread over a week. Here's a typical outline:
| morning | afternoon | |
|---|---|---|
| Monday | Introduce the inception, kick off, and Write the Product Vision | The product Is – Is not – Does – Does not |
| Tuesday | Describe the Personas | Discover the Features |
| Wednesday | Technical, User eXperience and Business Review | Show the User Journeys |
| Thursday | Display Features in Journeys | Sequence the Features |
| Friday | Build the MVP Canvas | Showcase the results of the inception to those interested in the project |
This schedule is an example, not a fixed plan — think of it as a sensible starting point for how the days might flow.
The session opens with an introduction and kick-off and closes with a showcase. Ideally everyone attends the whole event, but for stakeholders who can't commit full time, the minimum is to be present at the introduction, kick-off, and showcase sessions.
Since the start of the COVID-19 pandemic in 2020, remote and hybrid inceptions have become common. In those settings, initial alignment workshops like the lean inception become even more important to keep distributed teams on the same page.
Deeper Dive
This overview condenses the material from Caroli's book Lean Inception. The book goes into greater detail on how to prepare for and run each activity, and includes tips and tricks collected from running real workshops that will help you run your own successfully.
