Abdul Rahman, Ismail (2023) Usability evaluation of manual material handling equipment used by manufacturing industries in warehouse operation. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Scientific evidence shows that manual handling equipment (MHE) is one of the effective controls that can lower the physical demands of manual material handling (MMH) activities. However, there is a lack on studies on MHE provided in the industries especially in terms of user satisfaction on the usability and verification of the devices when performing their job and task. The objectives in this research are to develop a survey instrument, determine the usability of MHE available in warehouse operation based on user experience and industrial expectation and verifies the most used MHE in reducing MMH issue through full factorial design of experiment (DOE). A valid and reliable survey instrument was developed based on face and content validation and reliability test with the Cronbach’s alpha value for each section ranging between 0.61 and 0.961. The result from the usability survey found that the most used MHE at manufacturing warehouse operation has not guaranteed that the pain and discomfort level on the body are reduced. The prevalence of musculoskeletal pain was highest for the left and right shoulder, lower back and both left and right foot. The results of the MHE usability evaluation among the workers show that some of the currently in use equipment are not meeting standards and user satisfaction, particularly in relation to energy consumption and comfortability, despite the fact that they were the most important desirable user usability attributes to help the end user perform their works and tasks. Verification through experimental study also shows that the use of pallet jacks and load carrying cart still pose a risk for lower back disorder and local muscles activities used (fatigue). In conclusion, the findings of this research indicate that the current level of usability of MHE that is being used in manufacturing warehouse operation is still at an unsatisfactory level. The result from the research will benefit the industries in selection of appropriate MHE to be used for their operation

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