Final answer:
The necessary step in the strategy formulation phase of strategic planning is translating high-level strategic objectives and measures to a smaller scale for operating units and individuals.
Step-by-step explanation:
To determine which would not be a necessary step in the strategy formulation phase of strategic planning, we need to evaluate each option. Option 1 - Formulating and identifying the organization's vision, mission, and principles - is a necessary step as it provides a clear direction for the organization. Option 2 - Creating a SWOT analysis - is also essential as it helps identify the organization's strengths, weaknesses, opportunities, and threats. Option 3 - Translating high-level strategic objectives and measures to a smaller scale for operating units and individuals - is part of the implementation phase rather than the strategy formulation phase. Therefore, option 3 is the correct answer.