DEVELOPMENT OF THE ERGONOMIC JOB LOAD ASSESSMENT SYSTEM THAT CAN FACILITATE WORKPLACE IMPROVEMENTS

(1)A通过两年的研究，将心理生理监测和基于检查表的小组工作相结合，开发了一套实用的工作负荷工效学评估系统。(2)In 1994年，选择工效学工作负荷的主要因素，包括材料处理，工作站操作，信息显示，筛选危险源，福利设施和工作组织。设计了一种新的工作负荷评估系统，包括连续生理监测装置、主观疲劳和负荷感问卷以及改进措施清单。（3）设计并测试了用于作业负荷监测的四通道连续记录装置。该设备能够在IC存储器中记录心率、综合肌电水平和上身倾斜度。时间研究结果可通过红外传输方式输入装置。通过记录疲劳感受、疲劳部位和心理负荷评价等方法分析主观变化。设计了涵盖上述领域的改进行动的行动检查表结构，以便小组讨论检查表结果。(4)In 1995年，新的评估系统被应用于实际工作情况，包括机器操作和护理工作。设计了现场使用行动清单，以便根据对工作情况的直接观察，指出切实可行的改进行动。制定了评估程序，将这些清单的使用与持续监测和调查问卷结合起来。（5）在上述研究的基础上，编制了一套易于使用的工作负荷评估工具，包括工作负荷监测工具、疲劳和精神负荷问卷以及改进措施清单。审查了应用该系统所需的注意事项。

(1)A practical system for ergonomic assessment of job load was developed through the two-year study program by combining psychophysiological monitoring and checklist-based group work.(2)In 1994, main factors of ergonomic job load were selected including materials handling, workstation operations, information display, screening hazard sources, welfare facilities and work organization. A new job load assessment system was designed to comprise a continuous physiological monitoring device, subjective fatigue and load feeling questionnaires and improvement action checklists.(3)The four-channel continuous recording device for job load monitoring was designed and tested. The device was able to record in IC memories heart rate, integrated electromyographic levels and upper body inclination. Time study results could be put into the device by means of infrared transmission. Subjective changes were analyzed by recording fatigue feelings, fatigued body parts and mental load evaluation, The structure of action checklists consisting of improvment actions covering the above-mentioned areas was designed so that the checklist results could be discussed by small groups.(4)In 1995, the new assessment system was applied to actual working situations including machine operations and care work. Field-use action checklists were designed that made it possible to point out practicable improvment actions on the basis of direct observation of the working situations. The assessment procedures for combining the use of these checklists with the continuous monitoring and quesionnaires were developed.(5)Based on these studies, an easy-to-apply package of job load assessment was compiled that consisted of a job load monitoring device, fatigue and mental load quesionnaires and improvement action checklists. Precautions required in applying the system were reviewed.