Explain the difference between IT Strategy, Tactics, and Operations andwhy is it important to understand the differences?

In your own words, explain the difference between IT Strategy, Tactics, and Operations.  Why is it important to understand the differences?  Why are plans needed at each level?  How do these principles apply to IT Management?  Create your own scenario or analogy to provide examples of each. In your replies, review the similarities and differences in each level. Is the scenario realistic? Does it work for all organizations or specific industries?