Final answer:
The nurse manager should first collect and analyze information about the current break assignment system to ensure data-driven decision-making and identify performance indicators to measure the effectiveness of any changes.
Step-by-step explanation:
When a nurse manager is considering changing the unit's method of assigning break times to benefit the flow of client care, the first action should involve a thoughtful and analytical approach. Before implementing changes, it is crucial to collect and analyze information about how the current system is working. This ensures a data-driven decision-making process, which is likely to yield positive results and enhance the efficiency and quality of patient care. It is also essential in this phase to identify performance indicators that would help the manager to ascertain whether the implemented change indeed benefits the unit. This could involve looking into patient care outcomes, staff satisfaction, or efficiency metrics. By following such an approach, the nurse manager demonstrates proactive problem-solving skills and contributes to continuous improvement in the healthcare setting.