The present invention relates to a method for determining the effectiveness of a golfer's swing requiring no club contact with the golf ball. The measurement and analysis system comprises an attachable and detachable module, that when attached to a golf club head measures three dimensional acceleration data, that is further transmitted to a computer or other smart device or computational engine where a software algorithm interprets measured data within the constraints of a multi-lever variable radius golf swing model using both rigid and non-rigid levers, and further processes the data to define accurate golf swing metrics. In addition, if the club head module is not aligned ideally on the club head a computational algorithm detects the misalignment and further calibrates and corrects the data.