Application of the EWMA chart based on the effective variance to monitor variability in fungicides multivariate quality control processes
DOI:
https://doi.org/10.33304/revinv.v14n2-2019003Keywords:
Effective variance, EWMA charts, multivariate process.Abstract
This article presents a case study, using a monitoring using the EWMA control chart based on effective variance, to show how the increase in variability of one quality characteristics affects the user in a sensitive way the results for this type of carte; in addition, this allows to expand the capacity to select different monitoring methods for multivariate process. In this study, subgroups submitted online were evaluated in the line of a manufacturing process of plant protectants or fungicides using two variables resulting from the process, established the parameters. When analyzing the EWMA control chart based on effective variance, was found that it generates very closed limits, which could be detrimental to samples with high variability.Downloads
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