Reduction of Bubble Defect and Production Leveling: Case Study of a Hard Disk Drive Company


  • Waraporn Chanwiang Chaiyaphum Rajabhat University
  • Sreymouy Sao
  • Sakchai Dondee
  • Supattra Budsaereechai


Reduct Defect, Reduct Defect, Reduct Defect, Jig&Fixture, Jig&Fixture, Jig&Fixture, 7 Waste, 7 Waste, 7 Waste


This research aimed to reduce the quantity waste from bubbles in the hard disk drive labeling process and to smooth production in the process of labeling and packing products according to the 7 Wastes. One waste problem is from bubbles on product labels being not smooth resulting in employee movement and time wastes. This study sought to improve this problem by collecting data and analyzing the root causes using a fishbone diagram. It was found that the waste bubble problem was caused by the weight not being able to diffuse all of the label. The researcher designed the Rubbing Tool Cover for pressing on the labels. Then the work process was improved by 1) studying the time spent at each station and reducing the cycle times using the ECRS technique, and 2) improving the barcode scanning equipment and process, dividing and reducing the time of work for each employee. The results of the research showed that the Rubbing Tool Cover reduced the waste bubble percentage defect on products from 18% to 2% (-88.88%), the percentage defect on packaging from 30% to 12% (-83.33%), and increased production capacity from 1,324 to 1,381 or 57 pieces/day, (+4.30%). As a result, the production process could run more smoothly.


Kaewsud, J. (2019). Production process improvement by using lean concept: The Case of Gloves Manufacturing in Songkhla. Published honours thesis, Prince of Songkla University. Thailand.

Ruanglok, S. (2017). Efficiency Improvement of Small Earth Leak Breaker. Published honours thesis, Thammasat University. Thailand.

Singthanu, S. (2018). Optimization the Production Line Auto Parts with Design Techniques Jigs, IE Network Conference 2018, Ubon Ratchathani, Thailand. 36, 560-567. (in Thai)

Thamchaisopit, P. (2016). Efficiency Enhancement of Production Process for Electronic Industry by Using Lean Manufacturing. Published honours thesis, Burapha University. Thailand.

Yongpisanphob, W. (2021). “Trends of Thai Business and Industry in 2021-2023 Electronics and Electrical Appliances Industry Hard Disk Drive (HDD)”. [online], Available: access on June 10, 2021.