This study proposed the cumulative sum (CUSUM) control chart as the statistical
process control (SPC) technique in detecting the stock profusion of round scads in
Thailand. The result of study exemplified the CUSUM control chart was apparently
capable to monitor changing in the stock of round scads. The negative deviation of
CUSUM statistic obviously illustrated a distinguishable signal of Thai round scad
resources was severely decreasing from 2008 to 2011.