[…] A previous article describes how to construct simultaneous confidence intervals for the proportions. But the Wilkinson variation of the Pareto chart uses marginal confidence limits, which are different. Marginal confidence limits can be easily generated by running a simulation of the multinomial distribution and using percentiles of the results. In SAS, the easiest way to simulate from the multinomial distribution is to use the RandMultinomial function in SAS IML. …