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Ask the execs in the room to fill out the line below the impact metrics with customer behaviors that drive those metrics. Use post-its and have everyone work individually on an initial brainstorm.
Below that ask that same person (or another executive) to list out the measures of success for that strategy (hint: these should be the impact metrics)
On a whiteboard, ask the highest paid person in the room to write down the current strategic goal for the year at the top