The study results showed that improving the working methods of the Assembly, air conditioning coil is hot before adding the output. Result before adjustments are working behind station 11 station updates encountered that can reduce the number of work stations, 2. Left channel 9 and to the study of productivity in the new working method improvements that increase productivity before the air conditioner coil heat produced each day, 120; 160 a day from production increases would add employees from the original rate to be 1 15 16 sanamya people added a hot coil and air conditioning 1 screwdriver 2 amount of wind machines and added the concept of productivity that can payback within 1. Will yield in investment accounted for 160 days,0 baht per day of opportunity and effective value line increased from 36.48% are 57.22%
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