Construction of quality control charts with sub-optimal size samples

Ozilgen M.

FOOD CONTROL, vol.9, no.1, pp.57-60, 1998 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 9 Issue: 1
  • Publication Date: 1998
  • Doi Number: 10.1016/s0956-7135(97)00069-8
  • Journal Name: FOOD CONTROL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.57-60
  • Middle East Technical University Affiliated: No


A case study is presented for construction of the quality control charts with suboptimum size samples obtained in a commercial brewery after measuring total acidity, apparent extract and pH of the wort; alcohol, real extract, carbon dioxide total acidity and pH of the bottled beer. Logarithmic transformation of the data was employed to construct the quality control charts, and centering of the data between the specification limits was assessed by means of the process capability index values. (C) 1998 Elsevier Science Ltd. All rights reserved.