Which of the following is NOT considered a valid assessment tool?

The choice of resume as the option that is not considered a valid assessment tool is well-founded because while resumes provide important information about a candidate's work experience, education, and skills, they are primarily used for documentation purposes rather than for assessment. Resumes do not actively evaluate a candidate's abilities, fit for the position, or potential performance in the role.

In contrast, structured interviews, work samples, and occupational questionnaires are all assessment tools that have been designed to gauge candidates' competencies and suitability for specific job functions. Structured interviews involve standardized questions aimed at evaluating candidates on specific criteria, ensuring fairness and consistency. Work samples allow candidates to demonstrate their skills through real or simulated tasks relevant to the job, providing insight into their practical capabilities. Occupational questionnaires are utilized to assess a candidate's interests and preferences in relation to job requirements, which also aids in determining fit for the role.

Thus, the resume's role as merely a summary of qualifications makes it unsuitable as an assessment tool compared to the other options that actively measure skills and competencies.