Musculoskeletal Disorders (MSDs) caused by computer use have become the most common ergonomic risks. The risk experienced can be in the form of financial losses or even lives. Therefore, efforts are needed to prevent the occurrence of ergonomic risks so as not to cause large losses. The Rapid Office Strain Assessment (ROSA) has been designed to identify ergonomic risk factors and is reliable for the assessment of office workers' MSDs. This study evaluates the potential risk of ergonomics in female office workers because a previous study found that MSDs were more common in women. From the two workers observed, it was found that workers 1 and 2 received different scores on several assessment components. The different things are the length of the seat holder, armrests, spine brace, and keyboard. This difference is caused by body posture and different types of chairs. The length of the chair and the spinal brace is influenced by the different postures of the two workers. Worker 1 has a shorter upper leg length than worker 2, so she cannot use the backbone section of the chair. Although there are differences in scores on some components of the assessment, both workers have the same final ROSA score, which is 5. This indicates that further posture assessment needs to be done using tools other than ROSA to detect the specific cause of MSDs levels.
The existance of Traditional Market is still irreplacable even by Modern Market which grow rapidly in this decade. This result comes from an observation showing that a lot of people still come and do transactions in Traditional Market. Johar Baru Market is of Traditional Market located in Central Jakarta. This market is supposed to accomodate 43.509 citizens who live in Administrative Village Johar Baru, Central Jakarta. The research utilizes data mining, particularly Market Basket Analysis methods to find the pattern of product sets association. From analyzed pattern, the research is continued by determining the eficient and efective layout in hope of reducing any congestions occured in Market. The result is to group vegetable sellers which currently spread over 17 blocks into 9 blocks and are placed at south of the market, to group fruit sellers which currently spread over 9 blocks into 4 blocks and are placed at south of the market, to group chicken sellers which currently spread over 7 blocks into 5 blocks and are placed at west of the market, to group meat sellers which currently spread over 5 blocks into 4 blocks and are placed at north of the market, to group fish sellers which currently spread over 7 blocks into 4 blocks and are placed at west of the market, to group primary substance sellers which currently spread over 13 blocks into 6 blocks and are placed at east of the market, to group Tofu and Fermented Soybean sellers which currently spread over 7 blocks into 3 blocks and are placed at east of the market, to group coconut sellers which currently spread over 3 blocks into 2 blocks and are placed at north of the market, to group food sellers which currently spread over 8 blocks into 5 blocks and are placed at east of the market, and to group processed food sellers which currently spread over 4 blocks into 2 blocks and are placed at north of the market.<p>Keywords: Johar Baru Market, Traffic Density, Market Basket Analysis</p>
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