Final answer:
A Dual career ladder is a career development plan allowing employees to advance without taking on managerial roles, promoting specialization and career growth in non-managerial trajectories.
Step-by-step explanation:
A career development plan that allows upward advancement for employees without requiring they be placed into managerial roles is known as a Dual career ladder. This system enables professionals, especially those in fields like engineering, science, law, and academia, to advance in their careers based on their expertise and contributions to their field without necessarily taking on managerial responsibilities. By providing an alternative path to career growth, dual career ladders help retain skilled employees who may not wish to enter management but still desire advancement and recognition.