[en] This guide presents a general framework for the design, development, and implementation of safety standards. That framework is derived from the logical character of the standard setters' task and from experience with actual standards. It first identifies the conditions under which standards are an appropriate management tool. Second, it presents four generic methods that may be used to develop safety policy. Third, it characterizes the design issues that arise in making that policy operational. At each step, it suggests particular strategies along with their inherent strengths and weaknesses. In particular, it shows the sensitivity of a standard's effective policy to seemingly technical aspects of the way it is drafted