Approved for public release; distribution is unlimited / The analysis of a break in production is usually performed by a government negotiator or cost analyst. The more effectively they are able to estimate the loss of learning due to breaks in production, the more likely that the final contract will be fair and reasonable. The research of this study focused on identifying the factors which contribute to a loss of learning due to a break in production and the methods which are available to quantify these factors. The four methods identified were the George Anderlohr, the DCAA, the Pinchon and Richardson, and the Cubic Curve. These methods were then analyzed using the data from two aircraft, the Grumman C-2A and the Bell Helicopter Textron AH-1W, both of which experienced breaks in production. This study concludes that the George Anderlohr approach is the most effective method to evaluate the loss of learning due to a break in production. / http://archive.org/details/measuringlosseso00ever / Captain, United States Marine Corps