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600 <br />500 <br />400 <br />300 <br />200 <br />100 <br />500 <br />480 <br />460 <br />440 <br />420 <br />400 <br />380 <br />360 <br />340 <br />320 <br />300 <br />280 <br />260 <br />240 <br />220 <br />200 <br />Example of a Shewart X —bar Chart for A-72 <br />UCL = 487 <br />UWL = 418 <br />CL <br />II <br />Y <br />n <br />11 <br />Y <br />w <br />Y <br />Y <br />Y <br />n <br />n <br />\I 11 <br />c :/ Y o <br />Y <br />n <br />►� e <br />Y <br />Y <br />Y <br />e <br />A /1 <br />Y <br />Y <br />Y <br />C J Y <br />U <br />n <br />n <br />Y <br />1I 3 5 7 <br />2 4 6 8 10 12 14 18 18 20 22 24 28 28 30 32 34 36 38 40 42 44 46 48 50 52 54 58 58 60 <br />Center line is 332 ug /I which is the flow adjusted mean concentration <br />UWL is 1 standard deviation; UCL is 1.645 standard deviations <br />Example of an Exponentially Weighted Moving Average Control Chart for A -72 <br />UCL <br />i <br />sALI riodaik <br />ri <br />Y <br />A at <br />r II <br />'a <br />V <br />ri <br />UWL <br />CL <br />1 I 3 I 5 I 7 I 9 1 1 ' 1 7 1 19 1 2123 1 25 1 27 1 2 x 9 1 31 1 33 1 35 1 37 1 39 1 41 1 43 1 45 1 47 1 49 1 51 1 53 1 55 1 57 1 59 1 <br />2 4 6 8 10 12 14 16 18 20 22 24 25 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 <br />