User Acceptance and Usability of the C-141 Job Guide Technical Order System.

摘要

This report documents a study of the user acceptance and usability of the technical data developed under the C-141 Job Guide Technical Order (TO) Program. Step-by-step, illustrated technical orders, called job guides, were developed to replace the original TOs on the C-141 aircraft. Job guides are characterized by detailed, fully proceduralized task instruction which are keyed to illustrations which identify each component and its location. Other features include a small handbook size, standardized verb usage, simplified writing style, job preparation instructions, identification of tools and parts required, and little or no referencing to other TOs. In this first large-scale application of the job guide concept, the following positive and negative factors affecting usability and user acceptance were identified using questionnaires, interviews and observation. Positive Factors included: small size; ease of reading and understanding good illustrations keyed to procedures; job preparation information; and information acceptable to both experienced and inexperienced technicians. Negative Factors included: too many volumes required for some task sequences; errors in the data; inability to locate information quickly; storage problems; and torn and lost pages. Although problems existed, the C-141 job guides are considered to be very usable and well-accepted. It is obvious that the development of the data and the implementation of the data are two very critical factors in the success of the job guide concept. (Author)