Working environmental quality such as noise, temperature and illumination that is appropriate to the human conditions as a worker will support human performance and work productivity. The noisy sound, high temperature and low illumination in work place is one of sources that derived a work stress, productivity decreases and it could cause the disease. In this research explores the analysis of the optimum setting for the noise (80 dB, 77 dB, 80 dB), temperature (18°C, 24°C, 34°C) and illumination (155 lux, 200 lux, 300 lux) to optimize manually envelope folding jobs productivity.
The analysis that will be implemented here is design experiments factorial method to determine the significant factors that influence manually envelope folding jobs productivity. Also, the response surface method will be applied to obtain the approximation model for manually envelope folding jobs productivity as a function of the factor found earlier so that the most optimum result can be obtained under a design optimization method.
According to the experiments results and analysis that the significant factors for manually envelope folding jobs productivity are noise and temperature, whereas the illumination factor(155 lux, 200 lux, 300lux) are not influence significantly for manually envelope folding jobs productivity . The optimum conditions of those factors to optimize manually envelope folding jobs productivity are 26,79°C for temperature and 63,49 dB for noise. This optimum conditions increase the productivity from 2,50 envelope/minute to 2,86 envelope/minute.
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