The magnitude of common-cause variation creates the upper and lower control limits in Shewhart control charts.2–5 Such charts summarise the work of health managers well. Figure 1 shows a Shewhart ...

To help distinguish between these two kinds of variation Shewhart devised the premier tool of SPC—the control chart (fig 2). Control charts have three important lines. The central line is the mean or ...

For efficient monitoring of process dispersion, we have proposed auxiliary information based Shewhart-type IQR control charts (namely IQRr and IQRp charts) based on ratio and product estimators of ...

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The Official Charts Company’s new annual charts book, The Official Charts & Hits: 2024, hits the book shelves this week. Featuring every Official Singles Chart and Official Albums Chart Top 75 ...

Alex Warren looks to secure a sixth consecutive week atop the Official Singles Chart, with Ordinary on course to reign supreme once more. Turn it up! Finally, Addison Rae could claim this week ...

Minecraft has remained first place on the Switzerland charts, according to SwissCharts.com for the 15th week of 2025. EA Sports FC 25 has remained second place, Mario Kart 8 Deluxe is up one to ...

The practices, including the final intrasquad scrimmage, provided a glimpse into how the Buckeyes might shuffle their depth chart for the next season. Here’s The Dispatch’s second crack at ...