When do you begin to prepare to duplicate a strategy that has proven successful?

I will keep this answer short and sweet. If a strategy drives quality pipe generation I would immediate duplicate and continue to refine.

When do you begin to prepare to duplicate a strategy that has been proven successful? Now :). If you approach it from a testing mentality with a reasonable budget if applicable, what benefit do you gain from waiting?

From my perspective, you should define success metrics at the very beginning of a campaign. This can of course vary by campaign type. Once this has been defined including the timeline and you reach a level of success, start planning your next hypothesis.

I wouldn’t say there is a set amount of time to do this. The nature of demand generation is that it is ever-changing. Be sure to consider seasonality and any other factors specific to your business that could impact the strategy.