Search Results - subject:"Control Chart"

Model based control charts in stage 1 quality control

Koning, A.J. - Erasmus University Rotterdam, Econometric Institute - 1999

In this paper a general method of constructing control charts for preliminary analysis of individual observations is presented, which is based on recursive score residuals. A simulation study shows that certain implementations of these charts are highly effective in detecting assignable causes.

Persistent link: https://www.econbiz.de/10008584758

Surveillance of the risk behaviour of a time dependent process

Schmid, Wolfgang; Zabolotska, Svitlana - 2008

Persistent link: https://www.econbiz.de/10003800378

EWMA charts for monitoring the mean and the autocovariances of stationary Gaussian processes

Rosołowski, Maciej; Schmid, Wolfgang - 2008

Persistent link: https://www.econbiz.de/10003800387

EWMA control charts for monitoring optimal portfolio weights

Golosnoy, Vasyl; Schmid, Wolfgang - 2008

Persistent link: https://www.econbiz.de/10003800395

Economic Design of A Modified Variable Sample Size and Sampling Interval Chart

Mahadik, Shashibhushan B.; Shirke, Digambar T. - In: Stochastics and Quality Control 22 (2007) 2, pp. 273-293

Abstract A comprehensive economic cost function is derived for a modified variable sample size and sampling interval (MVSSI) chart. As a variable sample size and sampling interval, a variable sample size, a variable sampling interval, and a static charts are particular cases of an MVSSI chart,...

Persistent link: https://www.econbiz.de/10014590840

An NP Control Chart Using Double Inspections

Wu, Zhang; Wang, Qinan - In: Journal of Applied Statistics 34 (2007) 7, pp. 843-855

The np control chart is used widely in Statistical Process Control (SPC) for attributes. It is difficult to design an … desired value. This article proposes a new np control chart which is able to overcome the problems suffered by the …

Persistent link: https://www.econbiz.de/10005492097

On the Superiority of a Variable Sampling Interval Control Chart

Mahadik, Shashibhushan B.; Shirke, Digambar T. - In: Journal of Applied Statistics 34 (2007) 4, pp. 443-458

control chart over the conventional fixed sampling interval (FSI) control chart, with respect to the zero-time performance …, for a wide class of process distributions. We provide a sufficient condition on the distribution of a control chart … feature is demonstrated for the control chart for individual observations used to monitor a milk-pouch filling process. …

Persistent link: https://www.econbiz.de/10005492129

Residual Responses to Change Patterns of Autocorrelated Processes

Ghourabi, Mohamed El; Limam, Mohamed - In: Journal of Applied Statistics 34 (2007) 7, pp. 785-798

This article studies the residual behaviour of various stationary processes in the presence of change patterns. Three types of change patterns are considered, Additive Outliers, Innovative Outliers and Level Shift. The knowledge of the residual behaviour is important for monitoring production...

Persistent link: https://www.econbiz.de/10005492150

On the monitoring of multi-attributes high-quality production processes

Niaki, Seyed Akhavan; Abbasi, Babak - In: Metrika 66 (2007) 3, pp. 373-388

Persistent link: https://www.econbiz.de/10005376007

Application of Multivariate Analysis to Increase the Yield of Dry Cell Batteries

Das, Arup Kumar - In: Journal of Applied Statistics 34 (2007) 3, pp. 239-248

In an organization, the manufacturing process of a dry cell battery was suffering from the problem of frequent stoppages in the assembly line. The complete battery manufacturing operation is highly automated and mechanized. It was suspected that excessive variation in overall height of bobbin...

Persistent link: https://www.econbiz.de/10005278870