The Lean Startup
by Eric Ries
Serial entrepreneur and author Steve Blank describes Eric Ries’s work as a “turning point” in the way startups are created and run. Blank praises Ries for his focus on customer needs and iterative development, which he argues are essential to success in today’s fast-paced business environment.

Summary
“The Lean Startup” is a guide to creating and growing successful startups in a world of constant change and uncertainty. Ries argues that traditional approaches to starting a business are often flawed, and that entrepreneurs should instead focus on “validated learning” to quickly and efficiently test their ideas and adapt to feedback. He outlines a methodology called the “lean startup,” which emphasizes rapid experimentation, continuous improvement, and a deep understanding of customer needs.
“The only way to win is to learn faster than anyone else.”
BIG IDEA 1: Validated Learning
Validated learning is the process of learning what customers really want from a product or service through experimentation and feedback. Ries argues that traditional approaches to building a startup are often flawed because they assume that the entrepreneur’s initial vision is correct and that customers will automatically flock to the product or service. However, this approach can lead to wasted time and resources if the assumptions are not validated by real-world feedback.
Instead of assuming that the entrepreneur’s vision is correct, Ries advocates for a process of continuous experimentation and iteration. This involves creating a minimum viable product (MVP) that is designed to test the entrepreneur’s assumptions about the market and gather feedback from customers. The MVP should be developed as quickly and inexpensively as possible so that the entrepreneur can start testing their ideas without investing too much time and resources upfront.
Once the MVP is launched, the entrepreneur should gather feedback from customers and use that feedback to improve the product or service. This process of learning from feedback is what Ries refers to as validated learning. By focusing on validated learning, entrepreneurs can avoid the trap of building a product or service that nobody wants, and instead create something that meets a real customer need.
To facilitate validated learning, Ries emphasizes the importance of data and analytics. Entrepreneurs should be collecting and analyzing data on customer behavior, engagement, and satisfaction in order to make informed decisions about how to improve their product or service. This data-driven approach helps entrepreneurs to avoid relying on intuition or guesswork, and instead make decisions based on real-world feedback.
One key aspect of validated learning is the importance of iteration. Ries argues that entrepreneurs should be constantly iterating on their ideas based on feedback from customers. This means that the MVP should be continually refined and improved until it meets the needs of the customer. The goal is to create a product or service that customers love, rather than one that the entrepreneur loves.
Validated learning is a powerful concept that helps entrepreneurs to avoid the common pitfalls of building a startup. By focusing on experimentation, feedback, and iteration, entrepreneurs can create products and services that are truly valuable to their customers, and build successful businesses in the process.
BIG IDEA 2: Build-Measure-Learn
Ries introduces the concept of Build-Measure-Learn, which is a framework for continuous innovation and validated learning. The Build-Measure-Learn framework consists of three key steps: building a minimum viable product (MVP), measuring the results of the MVP, and learning from the feedback received.
The first step of the Build-Measure-Learn framework is to build a minimum viable product (MVP). An MVP is a version of the product that has just enough features to test the entrepreneur’s assumptions and gather feedback from customers. The goal is to build the MVP as quickly and inexpensively as possible, so that the entrepreneur can start gathering feedback and learning from real-world results.
Once the MVP is built, the next step is to measure the results. This involves collecting data on customer behavior, engagement, and satisfaction. The data should be analyzed to determine whether the assumptions about the product are correct, and whether customers are finding the product valuable. This step is critical because it helps entrepreneurs to avoid wasting time and resources on products that don’t meet the needs of the market.
The final step of the Build-Measure-Learn framework is to learn from the feedback received. This involves taking the data collected from the MVP and using it to inform decisions about the product. For example, if customers are not finding a particular feature valuable, the entrepreneur can use that feedback to make changes to the product. By continually iterating on the MVP based on feedback from customers, entrepreneurs can create a product that meets the needs of the market.
One of the key benefits of the Build-Measure-Learn framework is that it helps entrepreneurs to avoid the common pitfall of building a product that nobody wants. By focusing on feedback from customers, entrepreneurs can create a product that meets a real need and has a greater chance of success in the market. Additionally, the Build-Measure-Learn framework encourages a culture of experimentation and continuous learning, which can lead to ongoing innovation and growth.
Ries emphasizes that the Build-Measure-Learn framework should be applied to all aspects of the startup, from product development to marketing and customer acquisition. By continually testing assumptions and gathering feedback, entrepreneurs can make informed decisions about how to grow and scale their business.
the Build-Measure-Learn framework is a powerful tool for entrepreneurs looking to create successful, customer-focused businesses. By building an MVP, measuring the results, and learning from the feedback, entrepreneurs can create products that truly meet the needs of the market and build businesses that thrive.
BIG IDEA 3: Innovation Accounting
Innovation Accounting is a way for startups to measure progress and make informed decisions based on data. Innovation accounting involves three key steps: defining a startup’s growth goals, establishing actionable metrics, and conducting regular experiments to test hypotheses.
The first step in innovation accounting is to define a startup’s growth goals. This involves setting specific, measurable targets for growth, such as increasing revenue, acquiring new customers, or improving user engagement. The goals should be tied to the startup’s overall mission and vision, and should be challenging but achievable.
The next step in innovation accounting is to establish actionable metrics. These are specific, quantifiable measures of progress toward the startup’s growth goals. Examples of actionable metrics might include customer acquisition cost, conversion rate, or lifetime value of a customer. These metrics should be tracked regularly, and should be used to make decisions about the startup’s growth strategy.
The final step in innovation accounting is to conduct regular experiments to test hypotheses. This involves creating a hypothesis about what will drive growth for the startup, and then testing that hypothesis through experiments. The experiments should be designed to collect data on the actionable metrics established in the previous step, and should be structured in a way that allows for rapid iteration and learning.
One of the key benefits of innovation accounting is that it allows startups to make informed decisions based on data, rather than relying on intuition or guesswork. By establishing actionable metrics and conducting experiments, startups can quickly learn what is working and what is not, and can adjust their strategies accordingly. This helps to reduce the risk of failure and increase the chances of success.
Another benefit of innovation accounting is that it encourages a culture of experimentation and learning. By continually testing hypotheses and collecting data, startups can create a culture of innovation that values learning and growth. This can lead to ongoing improvement and innovation, and can help startups stay ahead of the competition.
Innovation accounting is a powerful tool for startups looking to grow and succeed in a rapidly changing market. By setting growth goals, establishing actionable metrics, and conducting regular experiments, startups can make informed decisions based on data, and can create a culture of innovation that values learning and growth.
“The goal of a startup is to figure out the right thing to build – the thing customers want and will pay for – as quickly as possible.”
Conclusion
“The Lean Startup” by Eric Ries is a groundbreaking book that presents a new approach to entrepreneurship and innovation. Ries introduces the concept of the lean startup, which emphasizes the importance of validated learning, rapid experimentation, and innovation accounting. By focusing on these key principles, startups can reduce the risk of failure, increase the chances of success, and create a culture of innovation that values learning and growth. Overall, “The Lean Startup” is an essential read for anyone looking to launch a startup or drive innovation in their organization.
About the Author
Eric Ries is an American entrepreneur, author, and consultant who is best known for his work on the lean startup methodology. He started his career as a software engineer and worked for several startups before founding his own company, IMVU. Ries is a prolific writer and speaker on entrepreneurship and innovation, and has been featured in numerous publications, including The New York Times, The Wall Street Journal, and Forbes. He is also the author of several other books, including “The Startup Way” and “The Lean Entrepreneur.” Ries is widely regarded as one of the leading thinkers on entrepreneurship and innovation, and his work has had a significant impact on the startup community.