What kind of specification defines the necessary qualifications and skills for a position?

The correct choice is a person specification, as it details the specific qualifications, skills, and characteristics an ideal candidate should possess for a given role. This document serves as a guideline for both employers and recruiters to identify suitable candidates during the hiring process. It outlines essential attributes such as educational background, work experience, technical skills, and personal qualities that align with the job's demands.

While a job specification may also be relevant, it typically refers to the duties and responsibilities of the position itself rather than focusing on the individual's attributes. Job analysis involves a broader assessment of the job's requirements and context, whereas a job overview generally provides a summary of the role without delving deeply into qualifications or skills. Therefore, the person specification is clearly the most appropriate choice for defining the qualifications and skills necessary for a specific position.