Robust Quality Control Chart
Description
Constructs robust quality control chart based on the median or Hodges-Lehmann estimator (location) and the median absolute deviation (MAD) or Shamos estimator (scale). These estimators are all unbiased with a sample of finite size. For more details, see Park, Kim and Wang (2020) . In addition, using this package, the conventional quality control charts such as X-bar, S and R charts are also easily constructed. This work was partially supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2017R1A2B4004169).