Monitoring Capability Indices using Run Rules
When doing a capability analysis it is recommended to first check that the process is stable, e.g., by using control charts. However, there are occasions when a process cannot be stabilized, but is nevertheless capable. Then the classical control charts fail to eciently monitor the process position and variability. The approach we suggest in this paper overcome this problem and solve it by proposing a new strategy, where capability indices are monitored in place of the classical sample statistics like the mean, median, standard deviation or range. The proposed procedure uses the family of capability indices proposed by V¨annman combined with one-sided 2-outof-3 and 3-out-of-4 Run Rules strategies. The experimental results presented in this paper demonstrate how the new proposed approach eciently monitors capable processes by detecting decrease or increase of capability level.
Capability indices Run Rules Capable processes
Philippe CASTAGLIOLA Petros MARAVELAKIS Stelios PSARAKIS Kerstin VANNMAN
Universite de Nantes & IRCCyN UMR CNRS 6597,Carquefou,France University of the Aegean,Department of Statistics and Actuarial-Financial Mathematics,Samos,Greece Athens University of Economics and Business,Department of Statistics,Athens,Greece Lulea University of Technology,Departement of Mathematics,Lulea,Sweden
国际会议
北京
英文
2007-05-30（万方平台首次上网日期，不代表论文的发表时间）