Final answer:
A survey of buyers' intentions forecast is best categorized as a survey of knowledgeable persons, which involves expert opinions rather than statistical methods or group judgments in sales forecasting.
Step-by-step explanation:
A survey of buyers' intentions forecast is a technique used in sales forecasting which involves asking customers about their future purchasing plans. This type of forecast falls under the category of surveys of knowledgeable persons or sometimes known as "expert opinion". It is not strictly a statistical method, which would involve analyzing numerical data to identify trends, nor is it a group judgment of the decision maker, which would rely on the consensus within a team of executives or managers.
To elaborate, the types of sales forecasting techniques can generally be categorized as follows: nonrational methods, which rely on subjective judgments; statistical methods, which use historical data and mathematical models; surveys of knowledgeable persons, where experts provide their insights; and group judgments, where a collective decision-making process occurs.