Recent work [2] proposed extending the OLAP data model to represent data ambiguity. Specifically, one form of ambiguity that work addressed arose from relaxing the assumption that all dimension attributes in a fact are assigned leaf-level values from the underlying domain hierarchy. Such data was referred to as imprecise. Allocation was proposed by [2] as a mechanism to deal with imprecision. I...

The production of a process is expected to meet customer demands, specifications or engineering tolerances. The ability of a process to meet these expectations is expresed as a single number using a process capability index. When the quality of the products relates to more than one characteristic, multivariate process capability indices are applied. As it is known, in some circumstances we are ...