Research Article

Nonparametric Confidence Limits of Quantile-Based Process Capability Indices

Figure 1

(a) and (b) are histograms with overlayed nonparametric kernel density curves using Silverman’s [8] rule-of-thumb bandwidth selection. (c) and (d) are control charts.
985152.fig.001a
(a) Before adjustment
985152.fig.001b
(b) After adjustment
985152.fig.001c
(c) Control chart (before adjustment)
985152.fig.001d
(d) Control chart (after adjustment).