PT Yogya Presisi Tehnikatama Industri is a company engaged in manufacturing such as making molds, industrial machinery spare parts, automotive and plastic injection. The problem that occurs in this company is that there is activity on the lathe operator that has the potential to cause fatigue and pain complaints such as Musculoskeletal Disorders in workers, the results of filling out the NBM Questionnaire found that there were complaints on the back with a percentage of 56.25%, right forearm 62.5 %, 56.25% left thigh, 50% left knee, 50% right thigh, 68.78% right calf, 87.5% right ankle, and 87.5% right foot. So companies need to do an analysis related to posture of workers. One technique or method that can analyze work posture is the WERA (workplace ergonomic risk assessment) method.As for based on the analysis, the suggestions for improvement given are that the shoulders form a moderate position of less than 60o with more pauses, the wrists form an angle of less than 50° with repetitions of 0 to 10 times per minute, on the neck in a position of 10°-20° with movement increased pause. On the operator's back with a position of 0°-20° with 4-8 repetitions per minute, on the leg factor in a normal upright position, with a duration of less than 4 hours, on the contact stress factor the suggestion given is to improve the posture on the worker's wrist earlier. If it's more than 50o, it's best if the wrist posture is less than 50o. Meanwhile, from the results of data processing, a comparison of the final working posture scores obtained in the posture before the proposal was 39 for facing activities, and 38 for drilling and drilling activities included in the MEDIUM category. While the WERA score after the proposal is 26, which is included in the LOW category.
 

PT SURYABUMI AGROLANGGENG is a company engaged in the plantation and palm oil processing industry. The problem that occurs in the company is the occurrence of defects in CPO oil in the form of defects in the raw material, namely FFB (Fresh Fruit Bunches), where the defects consist of F00, F0, and F5 defects with large defects, namely 28.16% FFB with fraction 0, then there are 12.07% FFB with a fraction of 00, and there are as many as 18.63% FFB with a fraction 5. From the problems and conditions that occur in the company, quality control can be carried out. One of the quality control techniques is using the six sigma method.
Six sigma method is a statistical concept that measures a process related to defects at the level of six (Six) sigma. Six sigma focuses on eliminating defects by emphasizing understanding, measuring, and improving processes. In six sigma there are 5 phase cycles namely Define, Measure, Analyze, Improve, and Control
Based on the results of data processing, it is known that the most dominant type of defect is Fraction 0 of 47.4%, from analysis using a fishbone diagram there are 4 factors causing defects, namely human, material, machine, and environmental factors. The improvement solutions obtained are conducting training, increasing work motivation with rewards, designing sorting aids using automatic technology, tightening and increasing supervision during harvesting, paying attention to lighting needs, implementing 5 S, monitoring production room temperature regularly, conducting trials. the machine before being used for the production process, replace the old pipe or sludge tank with a new one.