HOW does a company choose the right strategy?

We are learning  about strategies in general, but specifically, HOW does a company choose the right strategy? .... Could it be that they conduct a SWOTT? As a follow-up question: Of the 15 strategies that exist, would anyone like to pick one and do a SWOTT Analysis on it, in relation to your business for this class? (it can be a VERY brief SWOTT)... How do business owners link their strategy back to the mission/vision? Can you link the strategy you have selected back to your mission/vision?