Accession Number : AD0782948

Title :   Human Engineering Evaluation of Two Fixed-Format Message-Entry Devices.

Descriptive Note : Final technical memo.,

Corporate Author : HUMAN ENGINEERING LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Keiser,Allen H. ; Mills,Gary R.

Report Date : JAN 1974

Pagination or Media Count : 112

Abstract : The report describes an experiment which tested two fixed-format message-entry devices(FFMEDs) developed for use in the TACFIRE system. Two matched groups of 16 subjects were used to evaluate the relative merits of the FFMEDs. The data presented were collected during the training and testing phases of the experiment. Data from the training phase illustrate the rates of learning and the error rates for the two devices. Data from the testing phase show that operators on both devices were unable to meet the requirement of entering messages within 60 seconds when bare-handed, or within 120 seconds when gloved. In addition, the results show high error rates for both devices. A large percentage of these errors are due to constraints placed on the device at procurement; other errors from the equipment design. Correlational analysis shows that, with the matching variables used in this experiment, subjects' performance can be predicted more accurately for one FFMED than for the other. (Author)

Descriptors :   *MESSAGE PROCESSING, *HUMAN FACTORS ENGINEERING, *FIRE CONTROL SYSTEMS, TACTICAL COMMUNICATIONS, DIGITAL SYSTEMS, AUTOMATION, ARTILLERY, INFORMATION SYSTEMS, PERFORMANCE(HUMAN), ERRORS

Subject Categories : Fire Control and Bombing Systems
      Human Factors Engineering & Man Machine System
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE