Jabarkan Sajarah dari Kadali prosés statistik dalam bahasa sunda

Kadali prosés statistik mimiti diwanohkeun ku Walter A. Shewhart dina awal taun 1920. W. Edwards Deming saterusna maké métodeu  SPC di Amerika Serikat salila Perang Dunya Kadua, tur geus hasil naekeun kualitas di hiji pabrik mesiu sarta strategi séjén nu penting dina produk. Deming ogé mimiti ngawanohkeun métodeu  SPC kana industri di Jepang sanggeus tamat perang.

Shewhart nyieun dasar keur kontrol chart sarta konsép nangtukeun "statistic control" tina rancangan percobaan nu taliti. While Dr. Shewhart drew from pure mathematical statistical théories, he understood that data from physical processes seldom produces a "normal distribution curve" (a Gaussian distribution, also commonly referred to as a "bell curve"). He discovered that observed variation in manufacturing data did not always behave the same way as data in nature (for example, Brownian motion of particles). Dr. Shewhart concluded that while every process displays variation, some processes display controlled variation that is natural to the process (common causes of variation), while others display uncontrolled variation that is not present in the process causal system at all times (special causes of variation).