Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: SPC yakatangwa naWalter A. Shewhart paBell Laboratories mukutanga kwema1920. Shewhart akagadzira chati chokudzora muna 1924 uye pfungwa yechimiro chokudzora kwenhamba. Kudzora kwechiverengero kwakaenzana nepfungwa yokushandurana yakagadzirwa nenyanzvi yezvinonzwisisika William Ernest Johnsonwo muna 1924 mubhuku rake rinonzi Logic, Part III: The Logical Foundations of Science. Pamwe chete neboka reAT&T iro raisanganisira Harold Dodge naHarry Romig akashanda kuisa kuongorora kwemienzaniso pane hwaro hwehuwandu hwehuwandu zvakare. Shewhart akabvunzana naColonel Leslie E. Simon mukushandiswa kwemachati ekudzora kugadzirwa kwezvombo paArmy's Picatinny Arsenal muna 1934. Chikumbiro ichocho chakabudirira chakabatsira kugombedzera Army Ordnance kuti iite AT & T's George Edwards kuti abvunze nezvekushandiswa kwehuwandu hwehutano hwehutano pakati pemapoka ayo nevashandi pakatanga Hondo Yenyika II.  Mubvunzo: Walter Shewhart akanga ari piyona weSPC here?
Bell Laboratories