Design of Jewel Stone Sharpener to Increase Jewel Worker Work Productivity in Bali

Abstract

Finishing process of workmanship on jewel stone at small scale industry of jewelry crafting in Subagan village Karangasem was polishing. This process was done manually by working posture were cross-legged sitting on the floor. This awkward working posture (cross-legged sitting) caused increase workload. High work load can decrease production and productivity. To solve these problems, increase productivity and income of craftsmen, the improvement effort should done by design of jewel stone sharpener in order to could be able to use as polishing tools of jewelry and then improve according to ergonomics approach. The research was conducted on 16 jewel craftsmen by "treatment by subject design" and three treatments methods. Work load was measured by using work heart rate which was count using ten pulses methods. Work productivity was assessed by amount of product per pulse rate. The data were analysed by using t pired test at significant level 5%. Results were showed as follows: significant of difference (p < 0.05) of work load, subjective disorders, and work productivity between control (T0) and treatments (T1). The average of work load on T0 and T1 were 104.29 ± 4.65 beats/minute and 88.64 ± 2.33 beats/minute or decreased 15.0%. And then the average of work productivity on T0 and T1 were 0.01002 ± 0.00042 and 0.05801 ± 0.00207 or increased 478,9%. Its can be concluded that T1 give larger decreased of work load and give larger increased of productivity compared with T0. That is why, it was recommended the design of jewel stone sharpener should be used by workmanship in polishing the jewel stone and ergonomics work station.