Should be done in a workshop, and use the tools below. They will produce input to other processes.
Identify opportunities and threats that lies outside of the industry, and are caused by external factors. If there are many variables, you may want to define scenarios that can be used to test how robust your strategy is under both likely and unlikely events.
Questions that must be answered:
What will impact your growth? Provide Opportunities/Threats for SWOT analysis. What will impact the things that enable the growth in your industry? Create future scenarios you can test your strategy on. What possible Black Swans exists?