“It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change.” – Charles Darwin
Good strategy and planning is essential. But strategy and plans should not be set in stone. Rather, they should reflect a continual process of review and adaptation: your understanding of your own technology and organisation will change, as will your understanding of the competitive landscape around you.
You need to accept this, devise strategies that are flexible enough to cope and allow your plans to evolve accordingly.