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Using Degradation Data to Improve Fluorescent Lamp Reliability

Summary: While statistically designed experiments have been employed extensively to improve product or process quality, they have been used infrequently for improving reliability. In this paper, we present a case study which used an experiment to improve the reliability (or lifetime) of fluorescent lamps. The effect of three factors from among many potentially important manufacturing factors was investigated using a fractional factorial design. For fluorescent lamps, failures occur when their luminosity or light intensity falls below a certain level. An interesting feature of this experiment is the periodic monitoring of the luminosity. The paper demonstrates how the luminosity's degradation over time provides a practical way to improve fluorescent lamps which are already highly reliable. Recommendations based on the experiment's results suggest that nearly a 70% improvement can be realized.

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  • Topics: Reliability
  • Keywords: Fractional factorial design,Reliability,Case study
  • Author: Tseng, Sheng-Tsaing; Hamada, Michael; Chiao, Chih-Hua
  • Journal: Journal of Quality Technology