Start with the right problem
A large list is not a market definition. Specify the business characteristics, regions, and exclusions that explain why a company belongs in your addressable market.
Define a market systematically, then turn it into a focused account universe.

A large list is not a market definition. Specify the business characteristics, regions, and exclusions that explain why a company belongs in your addressable market.
Build a repeatable sourcing rubric, normalize company identities, and group accounts by fit. Review uncertain matches and keep coverage gaps visible instead of treating a single search as complete.
Measure the quality of a sampled set, the overlap between sources, and the proportion of accounts with a clear qualification reason.
Define a market systematically, then turn it into a focused account universe.
An illustrative path through the work. Adapt the inputs, conditions, and review points to your team.
