In the last two years, several authors have commented critically on the 99.6 percent standard for humanitarian mine clearance adopted by the United Nations and its agencies. These standards are being redrafted, yet from the literature and recent comments, it is clear that there is little intellectual foundation on which to build a new standard. There are three issues that need to be addressed. First, what is an acceptable quality standard for humanitarian demining? Second, how can one measure the quality levels actually achieved in humanitarian demining? Third, how can one implement a cost-effective training and monitoring process to ensure that the desired standard is achieved consistently