Which of the following is NOT a SPIN question type?

In the context of SPIN selling, each type of question serves a specific purpose in the sales conversation. SPIN is an acronym that stands for Situation, Problem, Implication, and Need-Payoff questions. These types of questions help sales professionals understand the needs and motivations of their customers, ultimately guiding them toward a solution that fits those needs.

Situation Questions gather background information about the customer's current situation to better understand their context. Problem Questions are designed to uncover issues or challenges that the customer is facing, which could present an opportunity for the salesperson's product or service. Need-Payoff Questions help the customer articulate the benefits of solving these problems and how their situation could improve with a particular solution.

Estimation Questions, however, do not fit into the SPIN framework. While estimation questions might prompt the customer to make calculations about cost, time, or resources, they do not directly focus on the core objectives of SPIN selling. Instead, they might lead the conversation away from the customer's problems and needs, which is crucial for effective sales dialogue. Thus, recognizing that Estimation Questions do not align with the SPIN methodology confirms that this is the correct choice for the question asked.