This report on the results of the application of the Health Services Mobility Study (HSMS) task analysis method in diagnostic radiology describes several career ladders starting from the aide level in quality assurance or patient care, rising to the technician level, and then on to the radiologic technologist level, with options to continue to supervision or to radiation physicist. A new job, quality assurance technician, is identified. The volume describes the method and results, the economic rationales for job restructuring, and the use of job ladders; it tells how to rationally restructure jobs after evaluating the allocation of tasks by level and content. It describes a career ladder program, cost strategies, trainee selection, and offers a mini-manual for performance evaluation using HSMS task data. It describes the components of a safe practice and quality assurance program, and includes a check list for the consumer. There are five technical appendixes. (Volume II, available separately, deals with curriculum objectives based on the task descriptions.) (Author/BL)