Assignment of Weights to Indexes in Evaluating Usability of Child Safety Chairs Based on AEMV Synthetic Weighting Method

摘要

Usability is a decisive factor of any child safety restraint (child-safety chair) in assessing its functions, making purchase decision, and using it properly and effectively. The article takes advantage of well-developed child chair evaluation regulations and processes worldwide, itemizes and discusses every correlation between usability evaluation index and misuse, and thus formulates usability evaluation indexes system consisting of symbol usability, usability of user manual, usability of child protection and usability of chair installation; builds AEMV synthetic weight assignment modeling combining AHP method, Entropy method and Mean Variance method, on account of usability evaluation that can be subjectively biased, and index weighting that can not be decided properly, in consideration of expertise and objective test data; and calculates any index weight assigned to child chair usability evaluation based on the present synthetic weight assignment modeling, and justifies the scientific strength and objectivity of the weights assignment method in question by means of result comparison and analysis.