Evaluation of Methods, Approaches and Simulation Quality in the Experimental Evaluation of Car Seat Comfort and Functionality

Abstract

This paper presents methodology, approaches and simulation actually used in the context of human factor studies designed to build knowledge on comfort and functionality of car seats. Backgrounds are literature and two own experimental studies. The methodology presented involves comparative studies with variation of one or several seat design factors. Scales for subjective evaluation of seat comfort and functionality, completing questionnaires and interviews are evaluated. Also compared are approaches to the design of sitting trials, involving real or simulated conditions. The simulations are qualified, in terms of what actually works. Physical data collection alternatives, namely, moving and still images and interface pressure data, are also commented upon. Anthropometric and other criteria for the selection of subjects are discussed together with sample size. Alternatives for tasks to be performed by trial persons are also discussed, along with the degree of freedom left to subjects. Alternative designs of standardized driving routes are compared. Driving tests validated the results arrived at in the laboratory tests, with both tests designed with methods and approaches presented in the paper.