Lean canvas

Lean canvas is a single page business model sheet with nine blocks, built to capture a startup idea in about twenty minutes. The lean in its name means test cheaply before you build, not the Toyota sense of waste and flow.

Ash Maurya adapted it in 2010 from the business model canvas, swapping four blocks for the ones a new venture worries about first: Problem, Solution, Key metrics and Unfair advantage.

The canvas is the artefact, not the method. Lean startup methodology is the loop of building, measuring and learning that fills the boxes in and proves them wrong; the canvas is only where the current answer lives.

Key takeaways

• Nine blocks on one page, written in pencil and revised whenever evidence lands.
• Problem and Customer segments are filled first; Solution is filled last.
• Every box is a guess with a date for testing it, not a statement of fact.
• The sheet is a snapshot of a model, never a business plan or a funding document.

How it works

You fill nine boxes on one page, starting with the problem and the people who have it. Each box holds a guess, you rank the guesses by what being wrong would cost, and you test the dangerous ones first.

The parent sheet is taught the same way. A small business class run by University of Nevada, Reno Extension frames the canvas as nine essential building blocks for creating, delivering and capturing value.

A box is only a guess until a customer answers it. The United States National Science Foundation (NSF) launched the I-Corps program itself in 2011 to teach customer discovery, so teams can quickly assess their inventions’ market potential.

That program says it has since helped launch more than 1,000 startups — a useful reminder that the sheet is worth little until somebody takes it outside the building.

A product manager usually owns the page, because the boxes map onto decisions they already make about who to serve, what to charge and what to build next.

The Solution box is deliberately small. That is why a product designer is asked for the thinnest version that tests the idea rather than a finished interface.

Evidence for the Problem box comes from interviews. A UX researcher runs them, and the discipline is to ask what someone did last time, never what they think they would do.

Design thinking supplies the same habit from another direction: watch the user, define the real problem, then build the cheapest thing that tests it.

Key metrics is the hardest box. Pick the two or three numbers that would change your mind about the model — total users is almost never one of them.

Fill the page fast and fill it rough. A canvas that takes a week has become a planning document — the point of the format is that you can redraw it after one surprising interview.

Examples

A lean canvas earns its keep when a team has more ideas than evidence. Three cases show the same page doing different jobs, and in each one the value sits in what the sheet rules out rather than in what it promises.

A business software team fills a fresh canvas before each new module. The Problem box names a job the customer already pays somebody to do badly, and the module is only funded once interviews confirm that job exists.

A food delivery venture in Southeast Asia uses the canvas to compare two customer segments side by side. Riders and restaurants need different revenue lines, so the team keeps two sheets and kills one after four weeks of trading.

A firm with no build capacity fills the Solution box through product outsourcing, which works as long as the partner is briefed on the assumption being tested rather than on a finished specification.

University spinouts use it before raising money. Research teams sketch the model, run the interviews, and come back with the Customer segments box rewritten more often than any other.

Watch which box keeps changing. The ones rewritten most often are the ones carrying the real risk — usually Problem and Customer segments, rarely Solution.

Related terms

• Product manager: owns the page and the decisions on it; the canvas is the artefact, not the role.
• Design thinking: the research habit that fills the Problem box; the canvas records what it finds.
• UX researcher: runs the interviews behind the Problem and Customer segments blocks.
• Joint venture: when two firms build together, each side fills its own canvas before terms are agreed.
• Unit cost of production: the number behind Cost structure, and the test of whether Revenue streams clear it.

FAQ

What are the nine blocks of a lean canvas?

Problem, Customer segments, Unique value proposition, Solution, Channels, Revenue streams, Cost structure, Key metrics and Unfair advantage. They fit on one page by design.

How is a lean canvas different from a business model canvas?

Both carry nine blocks, but the lean version replaces Key partners, Key activities, Key resources and Customer relationships with Problem, Solution, Key metrics and Unfair advantage. It is tuned for ventures with no customers yet.

Is a lean canvas a business plan?

No. A plan argues a case over many pages, while the canvas records a model in a form you can rewrite after a single interview.

Who fills in a lean canvas?

The founders or the product team, together and in one sitting. Handing it to one person produces a tidy sheet that nobody argues with, which defeats the point.

How often should you update a lean canvas?

Whenever a test changes an answer, which in an early venture can be weekly. Date each version so you can see which guess died and when.

Start with the outsourcing research at Outsource Accelerator.