Which technique is used to validate assumptions in a business context?

In the context of validating assumptions in a business scenario, the technique of expert review is particularly effective. This method involves consulting individuals who have significant experience or knowledge in a relevant field to evaluate the assumptions being made. Experts can provide insights based on their expertise, highlighting potential flaws or areas that require further research, thereby ensuring that the assumptions are grounded in reality and not just based on speculation.

While the other techniques mentioned, like a validity index or a "fresh eyes" review, can also play a role in the validation process, expert reviews bring a level of authority and subject-matter expertise that is invaluable for rigorous assumption validation. By leveraging the knowledge of experts, businesses can ensure that their strategies and decisions are informed by accurate data and sound reasoning, reducing the risk of costly mistakes based on unverified assumptions.