The double sampling range chart | Zendy

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The double sampling range chart

Author(s) -

Costa Antonio

Publication year - 2017

Publication title -

quality and reliability engineering international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.913

H-Index - 62

eISSN - 1099-1638

pISSN - 0748-8017

DOI - 10.1002/qre.2232

Subject(s) - chart , x bar chart , statistics , computer science , ewma chart , \bar x and r chart , control chart , sampling (signal processing) , mathematics , process (computing) , telecommunications , operating system , detector

The R chart and the S 2 chart are the usual charts for monitoring process dispersion; however, the double sampling ( DS ) scheme has only be used with the S 2 chart. The difficulty in obtaining the properties of the DS R chart might explain the lack of papers dealing with this type of DS chart. The S 2 chart has the advantage of being more efficient than the R chart, but the same is not always observed with their DS versions. Depending on the size of the 2 samples, the DS R chart performs better. The trade‐off between operational simplicity and power of detection might lead the practitioner to choose the DS R chart, even with the DS S 2 chart signaling faster.

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