Although cusum charts and Shewhart charts are both used to detect shifts in the process mean, there are important differences in the two methods. Each point on a Shewhart chart is based on information ...

symbol v=dot c=salmon; title 'Cusum Chart for Average Weights of Cans'; proc cusum data=oil; xchart weight*hour / mu0 = 8.100 /* Target mean for process */ sigma0 = 0.050 /* Known standard deviation * ...