Edison Bulbs

Kee Tat Lighting Limited

Keetat logo.png

Achieved outstanding results through Comprehensive Process Reform

Industry: Lighting Industry Service: Subtractive quality assurance, process improvement, cost reduction 

TQM provided comprehensive consulting services for Keetat Lighting

  • Focused on Production Material Control, accelerated the production process and semi-finished product turnover, increased ¥13 million in working capital, and saved the company’s ¥1.5 million in WIP every year and successfully reduced 44% of sluggish materials

  • Changed the SMT workshop production model, shortened the entire production cycle from 14 days to 2 days, changed the island-style production layout due to long ageing time, and shortened the assembly time from 7 days to 1 day

  • Solve the product steady-state/burn-in test problem, optimize the filament firing process, reduce the defect rate from 3% to 0.4%, i.e. more than 85%

  • Used JIT/VMI to improve warehouse and purchasing management, the inventory turnover rate has been increased from 7 revolutions per year to 14 revolutions per year!


TQM's Principal Consultant, Ir. Dr. Aaron TONG (Center) & Keetat's Director, Mr. ON

Keetat Lighting Co., Ltd. is a leader in the solid-state lighting market and a well-known manufacturer of smart products and audio products. The products are sold all over the world and the annual turnover exceeds 100 million US dollars. To develop high-quality and creative products more effectively for customers is Keetat Lighting's persistent pursuit of excellence! Keetat hired TQM to carry out a 16-month benefit reform project, which improved the entire manufacturing process and after-sales customer satisfaction.


Product Aging Time


Defect Rate in the ageing test


Sluggish Material Storage


>120 min



60 min



Significantly reduce the defect rate

More on...

Process Improvement

Supply Chain Management

Management System

Energy Efficiency