The dates of U.S. business cycle are reported by NBER with a considerable delay, so an early notion of turning points is of particular interest. This paper proposes a novel sequential approach designed for timely signaling these turning points. A directional cumulated sum decision rule is...

Kategoriale (nominale) Zeitreihen treten in den verschiedensten Bereichen der Praxis auf, wie der Informatik, der Biologie, der Sprachwissenschaft, u.Ä. Trotz ihrer praktischen Relevanz gibt es keine Monographien, welche die verschiedenen Aspekte bei der Analyse kategorialer Zeitreihen...

Einführung in Six Sigma: Die Philosophie von Six Sigma; Definitionen und statistische Grundbegriffe; Elemente von Six Sigma; Six-Sigma-Organisation; Projektauswahl und -vorbereitung -- DEFINE: Auswählen der wichtigsten CTQ; Erstellen der Project Charter -- MEASURE: Wichtigste Outputmesskriterien...

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.

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.