Market evaluation is one of the most important and most poorly done activities in venture building. The typical approach — find a large market, estimate a small percentage of it, declare the opportunity significant — tells you almost nothing useful about whether you can actually build a successful business in that market.
A more useful evaluation starts with the customer, not the market. Who specifically has this problem? How do they currently solve it? What would it take to get them to switch to something new? The answers to these questions tell you more about market opportunity than any top-down sizing exercise.
Competitive dynamics matter more than market size. A large market with entrenched incumbents and high switching costs is often less attractive than a smaller market where customers are underserved and switching costs are low. The question is not how big the prize is but how accessible it is.
Timing is a dimension of market evaluation that is often underweighted. Markets that are growing are generally more forgiving of execution mistakes than markets that are flat or declining. In a growing market, a rising tide lifts all boats. In a flat market, every customer you win is one your competitor loses, which changes the competitive dynamics significantly.
Your own capabilities are a constraint on market selection that founders often underweight. A market that requires deep regulatory expertise, long sales cycles, or significant capital intensity may be genuinely attractive but genuinely inaccessible to a team without those specific capabilities.
The goal of market evaluation is not to find the perfect market. It is to find a market where your specific capabilities give you a real advantage, where the competitive dynamics are workable, and where the customer need is strong enough to support a durable business.
