Final answer:
The statement is false; both a firm's mission and vision can change, but the mission statement is traditionally more enduring, serving as the company's foundational purpose, while the vision statement describes desired future achievements and may be more flexible to change.
Step-by-step explanation:
The statement is false: a firm's mission tends to be enduring, while its vision can change in light of changing environmental conditions. In practice, both mission and vision statements serve different purposes and can change, but a mission is usually designed to be more enduring, outlining the company's purpose and primary objectives. A vision statement, on the other hand, is meant to provide direction and inspire the organization towards future goals, which may change as the company evolves or as external conditions shift. When a company's external environment changes, it may prompt a reevaluation of both the mission and vision, however, a firm's mission often remains stable as it reflects the company's foundational purpose. Vision statements are more subject to change as they embody the desired future position or where the company envisions itself in the long term.