Statistical control of a moulding process

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F29142890%3A_____%2F16%3AN0000037" target="_blank" >RIV/29142890:_____/16:N0000037 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Statistical control of a moulding process

Popis výsledku v původním jazyce

The paper deals with the problem of statistical process control (SPC) applied on the process of moulding tin coated cold rolled steel. The process level fluctuates around the historical mean, subgroup averages in the X-bar control chart show an extensive variation and as a result, frequent signals occur. Considering the high process capability, it would be pointless to seek assignable causes and take measures to remove this variation at the current state of the art; it is regarded an inherent part of the process. From this reason the classical X-bar control chart cannot be used. The solution consists in relaxing control limits so that only major shifts of the process mean are signalled. Several approaches based on a chosen time-dependent distribution model of the process are considered in the paper. Methods of the model identification and formulas for the construction of extended control limits are applied on two controlled quality characteristics, the planarity and length of moulded frames to show calculations for both one-sided and two-sided specifications. Moreover, calculation of capability and performance indices for the time-dependent models is discussed.

Název v anglickém jazyce

Statistical control of a moulding process

Popis výsledku anglicky

The paper deals with the problem of statistical process control (SPC) applied on the process of moulding tin coated cold rolled steel. The process level fluctuates around the historical mean, subgroup averages in the X-bar control chart show an extensive variation and as a result, frequent signals occur. Considering the high process capability, it would be pointless to seek assignable causes and take measures to remove this variation at the current state of the art; it is regarded an inherent part of the process. From this reason the classical X-bar control chart cannot be used. The solution consists in relaxing control limits so that only major shifts of the process mean are signalled. Several approaches based on a chosen time-dependent distribution model of the process are considered in the paper. Methods of the model identification and formulas for the construction of extended control limits are applied on two controlled quality characteristics, the planarity and length of moulded frames to show calculations for both one-sided and two-sided specifications. Moreover, calculation of capability and performance indices for the time-dependent models is discussed.

Druh

D - Stať ve sborníku

CEP obor

BB - Aplikovaná statistika, operační výzkum

OECD FORD obor

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Projekt

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Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2016: 25TH ANNIVERSARY INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS

ISBN

978-80-87294-67-3

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

1638-1645

Název nakladatele

TANGER Ltd.

Místo vydání

Ostrava, Czech Republic

Místo konání akce

Brno, Czech Republic

Datum konání akce

25. 5. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000391251200268