Final answer:
The manager omitted two important steps in the critical thinking process: identifying assumptions and considering how the change might affect staff relationships.
Step-by-step explanation:
The manager omitted two important steps in the critical thinking process: a) Identified what assumptions were underpinning the issues and b) Considered how this change might affect staff relationships.
By not identifying the assumptions, the manager failed to recognize the underlying beliefs or ideas that influenced the staff's concerns and complaints. This could have helped in addressing those concerns more effectively.
Additionally, by not considering how the change might affect staff relationships, the manager overlooked the potential impact on teamwork, communication, and morale. This could have contributed to the staff's resistance and dissatisfaction.