Shewhart wuxuu horumariyay shaxda xakamaynta 1924 iyo fikradda gobolka ee xakamaynta tirakoobka. Xakamaynta tirakoobka waxay u dhigantaa fikradda is-beddelka ee uu soo saaray logician William Ernest Johnson sidoo kale 1924 buugiisa Logic, Part III: The Logical Foundations of Science. Isaga iyo koox ka tirsan AT&T oo ay ku jiraan Harold Dodge iyo Harry Romig wuxuu ka shaqeeyay sidii kormeerka muunad qaadista loo saari lahaa saldhig tirakoob macquul ah sidoo kale. Shewhart wuxuu la tashaday Kornayl Leslie E. Simon codsiga jaantusyada xakamaynta ee wax soo saarka rasaasta ee Ciidanka Picatinny Arsenal sanadkii 1934. Codsigaas guusha leh wuxuu ka caawiyay inuu ku qanciyo Ciidanka Ordnance inuu ku lug yeesho la-talinta George Edwards ee AT&T si uu uga tashado adeegsiga xakamaynta tayada tirakoobka ee qaybaha iyo qandaraaslayaasha ka dib markii uu qarxay Dagaalkii Labaad ee Adduunka.
Shaybaarrada Bell