Open AccessImprovement of production quality of trays to collect Covid-19 diagnostic samples from airlines passengers
Author(s) -
Nisara Paethrangsi,
S. Teekasap
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/918/1/012222
Subject(s) - six sigma , thermoforming , dmaic , covid-19 , lean six sigma , quality (philosophy) , manufacturing engineering , production (economics) , process engineering , process (computing) , computer science , reliability engineering , engineering , mechanical engineering , medicine , lean manufacturing , physics , disease , pathology , quantum mechanics , infectious disease (medical specialty) , economics , macroeconomics , operating system
The objective of this research is to study guidelines of defects reduction in producing trays for collecting test tube of Covid-19 diagnostic samples. The goal is to limited defects from thermoforming process at less than 3,000 defect part per million (DPM) with Cpk ≥1.33. Current sigma level is ≥4, reduction methodology has been preceded by following DMAIC of Six Sigma techniques and simulate by general full factorial design for experimenting. The results showed that to reduce DPM in plastics thermoforming process was contributed from controlling level of heat temperature at 230-320°C and forming duration of 2 seconds. Defect is reduced from 0.0153 to 0.0062. Process capability index is improved from ≥ 1.17 to ≥ 1.33 and level of sigma has increased from ≥ 3.5 to ≥ 4.