The document discusses the key elements of conducting assessment centers, which are used to evaluate candidates for jobs in an accurate manner. It describes that assessment centers typically involve candidates completing exercises that simulate job activities, along with psychometric testing and interviews. Several tools used in assessment centers are discussed in detail, including interviews, leaderless group discussions, in-basket exercises, management games, presentations, and role-playing. The role of assessors is to observe candidate behavior during exercises and rate performance on various competencies. When designing assessment center tools, considerations include ensuring accuracy, fairness, reliability, and reflecting the skills required for the job.