A single outlier in a regression model can be detected by the effect of its deletion on the residual sum of squares. An equivalent procedure is the simple intervention in which an extra parameter is added for the mean of the observation in question. Similarly, for unobserved components or...

A key issue for manufacturers is supplier management, i.e. organising theoptimal flow of high quality, value-for-money materials or components fromappropriate innovative suppliers. Many companies now recognise the central rolethat supplier management plays in achieving long-term competitive...