Strategy planning is performed so organizations can achieve their ends with a concrete set of procedures

This step is performed to answer the question: Where do we want to be?
The mission describes the purpose of organizations, the reason why they exist
A poor understanding of an organization’s mission truncates attempts of a successful strategic planning and an efficient tactical decision-making process. Short-minded missions can lead organizations to their end.
The vision describes what the company wants to achieve
It’s a shared image of what the organization is expected to become and be recognized as such. It is expressed in terms of success in the eyes of their customers. It implies an element of noble purpose and high values, something that is considered especially meritorious.
Why is a Vision necessary?