Quality control scatter plots

Quality Awareness. The new giobai economy has introduced a competitive way of doing business, industriai manufacturers use advanced quaiity techniques to stay ahead of the competition. These techniques are taught openiy and used by the entire company. Technicians shouid be aware of these quaiity techniques, which inciude fiowcharts, controi charts, statisticai process control, scatter plots, histograms, Pareto charts, run charts, lSO-9000 criteria/certification, and training. 

NONMEM was a Fortran program written as a DOS application that requires the user to write a control stream that identifies how to read in the data, how the model is defined, and what postprocessor activities should be called, such as building a table. To obtain quality scatter plots requires input into another statis-... 

Time Series A time series is a sequence of observations that are ordered in time (or possibly space). A relevant example would be the analytical data obtained for a quality control (QC) sample or a certified reference material (CRM) on a weekly basis. If such measurements are made as a function of time, it is sensible to display the data in the order in which they were obtained, best in a scatter plot in which the measured value x is plotted as a function of time as the independent variable (in this case, however, something over which we have little control ). There are two kinds of time series data, continuous in which data are recorded at every instant of time (e.g., temperature and/or humidity in a climate-controlled laboratory), and discrete in which data are recorded at (usually regularly) spaced intervals, e.g, the QC analyses mentioned above. 

As seen in Section 3 excellent insight into surface quality, defects, and bulk purity can be obtained from scatter measurements. Also, astute analysis can result in simple, inexpensive in-process and final quality control procedures for production of a variety of surfaces, materials, and optics. As can be seen, much can be learned from visual examination of BRDF plots and raster scans. This is often sufficient for pass/fail tests of product quality. The data can also be analyzed in more detail using various formulas and computer programs. In addition, because the data are digital, they can be rapidly analyzed by computer in on-line process control applications. SORIC and leaders in the stray light community have developed a BRDF database (16, 17) for commonly used surfaces and materials employed by scientists and engineers (18,19, 20, 21, 22, 23). 

In practice, one of the best ways to use multiangle measurement in quality control or for trace amount detection is the Fingerprint Method [73]. In this method the cumulants analysis is performed on the ACF s at several angles separately the mean size are then plotted versus the scattering angle. Based on the fact that larger particles scatter more strongly in the forward direction and... 

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