"How long should a long-term strategy be?"

"I find that giving strategy an a priori time frame is the wrong way around. Instead, the time frame should depend on the strategy. To be clear, “What time frame should we have for our strategy?” is the wrong question. The better question is, “What changes does our strategy need, and how much time do we need to implement them?” In other words, leaders have a five-year strategy if the changes they want to make to their strategy will take five years to implement.
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The ideal time frame depends more on what changes leaders want to make to their strategy than on the business they are in.
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Great strategies are, among other things, highly specific about a company’s target customer, value proposition, and leading capabilities. It’s impossible to know with much specificity what these should be a decade from now. Imagine how much water will pass under the bridge between now and then, let alone over the next century. Yet it’s also impossible to change overnight the essential elements of a strategy in any meaningful way. Choosing a time frame that’s too short will force leaders into a mode of incremental strategy, and that is a recipe for failing to keep pace with a changing world."

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