Final answer:
The use of job analysis to assign all duties and identify overlaps is most related to job design, which aims to structure work efficiently and satisfies employee needs.
Step-by-step explanation:
Using job analysis to ensure that all duties have been assigned and for identifying areas of overlap within duties is most related to c) Job design. Job design is a fundamental process that involves structuring work and designating tasks to ensure efficiency and employee satisfaction. The job analysis plays a pivotal role in this process by providing a detailed breakdown of job tasks and requirements. Through methods like observation, surveys, and interviews, job analysis ensures each duty is clarified and assigned, preventing redundancy and promoting a well-organized allocation of responsibilities within a company.