Monitoring the coefficient of variation: A literature review

Zahra Jalilibal (1) , Amirhossein Amiri (1) , Philippe Castagliola (2) , Michael B.C. Khoo (3)

1 Shahed University [Téhéran]
2 LS2N - équipe SLP - Systèmes Logistiques et de Production
3 USM - Universiti Sains Malaysia

There are some situations when the process mean fluctuates from time to time but is still considered as incontrol and the process standard deviation is a linear function of the process mean. In addition, in some cases, the mean and the variance of a process are actually dependent on each other. In these situations, many researchers have suggested to monitor the CV (Coefficient of Variation) as a single statistic. In this paper, a rigorous content analysis method (based on 71 related studies in this area from 2007 to 2021) is applied to categorize the articles that use the coefficient of variation in the SPM (statistical process monitoring) field, to identify the research gaps and to provide guidance to stimulate further researches in this direction.

Mots clés: Control chart; Coefficient of variation (CV); Phase I; Phase II; Statistical process monitoring (SPM)

Domaines: Statistiques [stat]; Génie des procédés

Zahra Jalilibal, Amirhossein Amiri, Philippe Castagliola, Michael B.C. Khoo. Monitoring the coefficient of variation: A literature review. Computers & Industrial Engineering, 2021, 161, pp.107600. ⟨10.1016/j.cie.2021.107600⟩. ⟨hal-03336179⟩