Tracking identified management changes in products and services is required to detect emerging problems. Various tools are used to distinguish real effect from sampling variance in service delivery. Performance of these tools is an integral part while determining the quality offered. In this vein, an improved modeling of Cumulative Sum (CUSUM) is developed to overcome the deficiencies associated with Shewart control chart. Improved CUSUM (iCUSUM) chart is a highly informative means of graphical presentation of data that can be ordered into a logical sequence. There is no gainsaying that road accident on Nigerian roads have been on the increase and urgent attention needed to be taken by gove
Download