New Process Capability Indices for One-Sided Tolerances

Grau, Daniel

doi:10.1080/16843703.2009.11673188

Cited by 15 publications

(14 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Grau [6] introduces the C u p (u, v) and C l p (u, v) indices to cover the processes with one-sided tolerances. The quality of a process is defined by the centring process and the proportion of non-conforming manufactured items.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Testing capability indices for one-sided processes with measurement errors

Grau

2013

Int. J. Metrol. Qual. Eng.

View full text Add to dashboard Cite

Abstract. In the manufacturing industry, many product characteristics are of one-sided tolerances. The process capability indices C u p (u, v) and C l p (u, v) can be used to measure process performance. Most research work related to capability indices assumes no gauge measurement errors. This assumption insufficiently reflects real situations even when advanced measuring instruments are used. In this paper we show that using a critical value without taking into account these errors, severely underestimates the α-risk which causes a less accurate testing capacity. In order to improve the results we suggest the use of an adjusted critical value, and we give a Maple program to get it. An example in a polymer granulates manufactory is presented to illustrate this approach.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Grau [6] suggests to the user to quantify the risk he considers the least serious when the mean shifts in the opposite direction from the target. When the risk is considered as k times less serious, Grau [6] suggests using the families…”

Section: Introductionmentioning

confidence: 99%

Testing capability indices for one-sided processes with measurement errors

Grau

2013

Int. J. Metrol. Qual. Eng.

View full text Add to dashboard Cite

show abstract

“…The proposed methodology, specially the estimation of the modified tolerance region, allows assessing processes even in a situation when one or more specification limits are unilateral. Most of the proposed in the literature, unilateral indices (or maybe even all of them) assume the value of + ∞ or − ∞ for the not given specification . But in many cases, this assumption can be modified and there could be given some values taken from the process.…”

Section: The Proposed Methodologymentioning

confidence: 99%

Multivariate Process Capability Index Based on Data Depth Concept

Ciupke

2016

Quality & Reliability Eng

View full text Add to dashboard Cite

The purpose of this paper is to provide a multivariate process capability index, which could be used regardless on data distribution and also on data correlation. Such an index could be defined because of application of non-parametric methodology that utilizes a data depth concept. Based on this concept, a two-phase methodology was developed. In the first phase the modified tolerance region is estimated, while in the second one, a current process is assessed using the proposed three-component index. Estimation of a modified tolerance region on the basis on historical data allows applying the methodology not only for bilateral quality characteristics but also for unilateral ones, where often in practice, the modified tolerance region could be defined as a closed region. The performance of the proposed index was evaluated using bilateral and unilateral examples. The obtained results showed that the proposed index performs satisfactorily for all the considered cases.

show abstract

“…Yum and Kim provided relevant literature in process capability analysis. Recent research related to two‐suppliers selection problem for a process with one‐sided specifications can be found in the literature …”

Section: Introductionmentioning

confidence: 99%

“…Recent research related to two-suppliers selection problem for a process with one-sided specifications can be found in the literature. [7][8][9][10][11][12] In recent years, Hosseinifard and Abbasi 13 employed the proportion of nonconformance concept to estimate the process capability for linear profiles with one-sided specifications. Wang 14 proposed two new indices C puA and C plA to measure the process yield for simple linear profiles with one-sided specifications.…”

Section: Introductionmentioning

confidence: 99%

Multiple Comparisons with the Best for Process Selection for Linear Profiles with One-sided Specifications

Wang

Tamirat

2015

Qual. Reliab. Engng. Int.

View full text Add to dashboard Cite

In this study, we propose the multiple comparisons with the best method based on the yield index to compare the process yields of K (K ≥ 2) suppliers for linear profiles with one‐sided specifications. The performance analysis of the proposed method is conducted. The numbers of profiles required for different power levels are also provided. A simulated data set from a leather dyeing process is presented to illustrate the applicability of the proposed method. Copyright © 2015 John Wiley & Sons, Ltd.

show abstract

New Process Capability Indices for One-Sided Tolerances

Cited by 15 publications

References 5 publications

Testing capability indices for one-sided processes with measurement errors

Testing capability indices for one-sided processes with measurement errors

Multivariate Process Capability Index Based on Data Depth Concept

Multiple Comparisons with the Best for Process Selection for Linear Profiles with One-sided Specifications

Contact Info

Product

Resources

About