Safety culture is widely known to have the ability to encapsulate all factors including perception, psychology, and attitude. This ability serves as an important role for organizations in occupational safety and health. Further, this ability is used as an effort to reduce the risk of accidents. One of the efforts made is to measure the level of maturity of the safety culture in the steel manufacturer production area by involving the variables of safety culture, namely commitment, leadership, responsibility, competence, engagement & involvement, information & communication, risk, and organizational learning. This study aims to measure the level of safety culture maturity in the activities production area of steel manufacturers. Data collection was carried out by distributing questionnaires with a purposive sample of 107 workers. Two expert judgments are involved as determinants of the safety culture variable weights using the AHP (Analytical Hierarchy Process) method. The results showed that the level of safety culture maturity in the production area of steel manufacturer was 3, 64, which falls in the proactive category. The priority for improvement of safety culture variables starts from the leadership to the information & communication.

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The post-paralysis due to stroke, spinal cord injury or musculoskeletal disorder can be restored by rehabilitation. A popular rehabilitation method used today are physiotherapy and therapy using electrical stimulation. Functional Electrical Stimulation (FES) is one of the methods of rehabilitation using electrical stimuli, and has been proven to be effective enough to restore muscle function that is weakened due to paralysis. Nowadays, FES devices on the market are designed to rehabilitate only one type of movement and not yet applied wearable and ergonomics design. Meanwhile, the FES devices developed by the laboratory has applied a wearable design and has been able to rehabilitate several movements at once, but not yet for ergonomics design. This study developed a usability instrument and do the usability evaluation for the FES medical devices which is rehabilitate multiple movements on the upper limb. The usability variables chosen for the usability evaluation are simplicity, learnability, memorability, informativeness, and trust ability. Usability evaluation is carried out by distributing questionnaires. Data obtained from the propagation of the questionnaire are processed by statistic method such as average value and standard deviation. The results indicate that the simplicity, learnability, and memorability variables were well applied to the developed FES devices. While the variables informativeness and trust ability dimension are still not properly applied to developed FES devices.

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