Vaněček, Drahoš; Trávníčková, Jiřina - In: Acta Universitatis Bohemiae Meridionales 6 (2003) 1, pp. 21-26
categories. The level of services is appreciated both for the ticket prices and keeping the bus time table schedule. For … evaluating the reality of time table schedule, the method of statistical quality control by means of 6σ was used. …