USL thiab LSL hauv kev txheeb cais yog dab tsi?
USL thiab LSL hauv kev txheeb cais yog dab tsi?

Video: USL thiab LSL hauv kev txheeb cais yog dab tsi?

Video: USL thiab LSL hauv kev txheeb cais yog dab tsi?
Video: Ke hlub yog dab tsi? 2024, Lub peb hlis ntuj
Anonim

LSL thiab USL sawv ntsug rau "Cov Lus Qhia Tshwj Xeeb Tshwj Xeeb" thiab "Kev Txwv Tshwj Xeeb Tshwj Xeeb" feem. Cov Lus Qhia Tshwj Xeeb tau muab los ntawm cov neeg siv khoom xav tau, thiab lawv hais qhia qhov tsawg kawg thiab qhov siab tshaj qhov lees paub ntawm cov txheej txheem.

Raws li, USL thiab LSL txhais li cas?

LSL sawv rau Qis Tshwj Xeeb Txwv thiab USL sawv rau Upper Specification Limit. Feem ntau peb piav qhia Cpk raws li lub peev xwm txheej txheem ua tiav lossis tsis yog txhais tau tias yog nyob nruab nrab ntawm qhov tshwj xeeb txwv.

Ib tus kuj tseem yuav nug tau, USL thiab LSL suav li cas? Lub ntsiab lus = 75 SD = 0.3 USL = 73 USL = 77 6S = 1.8 6S ntawm txhua sab ntawm qhov nruab nrab rau qhov tshwj xeeb txwv. Raws li kev faib khoom ib txwm muaj, feem pua ntawm cov khoom lag luam uas yuav poob ntawm qhov tshwj xeeb tuaj yeem yog xam . Xav tias peb muaj txheej txheem nrog txhais = 50, tus qauv sib txawv = 4, USL = 58 ib LSL = 46.

Ib yam nkaus, USL thiab LSL hauv daim ntawv tswj hwm yog dab tsi?

Cov USL lossis cov lus qhia tshwj xeeb sab saud thiab LSL lossis qis dua qhov tshwj xeeb txwv yog txwv los ntawm koj cov neeg siv khoom xav tau. Nov yog qhov kev hloov pauv uas lawv yuav lees txais los ntawm koj cov txheej txheem. Hauv qab no yog a daim ntawv tswj qhia qhov no.

Puas yog USL LSL thiab UCL LCL cuam tshuam?

USL yog qhov tshwj xeeb tshwj xeeb txwv, thaum LSL yog qhov qis tshaj qhov tshwj xeeb txwv. USL thiab LSL tau hais los ntawm / raws li cov neeg xav tau. Cov txheej txheem yuav tsum tau ua raws tau hais los ntawm kev lag luam xav tau, raws li cov neeg siv khoom muaj kev cia siab sib txawv. UCL yog txoj cai tswj hwm sab saud, LCL kev tswj qis.

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