Final answer:
In the externally oriented planning phase, plans are developed by heavily involving the input of managers from upper levels, not lower levels.
Step-by-step explanation:
False. In the externally oriented planning phase, plans are developed by heavily involving the input of managers from upper levels, not lower levels. It is during this phase that input from managers who have a broader perspective is sought to ensure that plans align with the organization's overall strategic direction. This allows for a more comprehensive and balanced approach to planning.