نمودار کنترل ترکیبی (cusum-shewhart (x,s

Combined Shewhart-cusum control chart for improved quality control in clinical chemistry.

We describe the adaptation of the decision limit cumulative sum method (cusum) to internal quality control in clinical chemistry. With the decision limit method, the cusum is interpreted against a numerical limit, rather than by use of a V-mask. The method can be readily implemented in computerized quality-control systems or manually on controls charts. We emphasize the manual application here ...

Shewhart on Economic Control 843 Shewhart on Economic Control

نمودار کنترل استوار برای داده‌های سری‌های زمانی

Improving the Performance of Combined Shewhart-Cumulative Sum Control Charts

For an improved monitoring of process parameters, it is generally desirable to have ef?cient designs of control charting structures. The addition of Shewhart control limits to the cumulative sum (CUSUM) control chart is a simple monitoring scheme sensitive to wide range of mean shifts. To improve the detection ability of the combined Shewhart–CUSUM control chart to off-target processes, we deve...

Phenomenology of B Xs

We present a brief review of the status and phenomenology of B Xs decays. The B Xs rate is known at the next-to-next-to-leading order in QCD and NLO in QED. QED corrections include only log-enhanced corrections of the type αem ln M2 W mb and αem ln m 2 b m 2 . The latter originate from a collinear singularity, they vanish when integrated over the whole phase space but survive the integration ov...

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