Orthogonal block designs for Scheffé's quadratic mixture model in three and four components have been considered by John (Technical Report 8, Center for Statistical Sciences, University of Texas, Austin, TX, 1-17), Czitrom (Comm. Statist. Theory Methods 17 (1988) 105; Comm. Statist. Theory Methods...

In banking, the quality of customer service holds primary significance, particularly in the context of sustained business growth. Unlike other industries engaged in the production of tangible goods, banks are unique in the sense that they produce and deliver the service at the delivery...