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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by ghinojosa[/i] [br]Is it possible to build a p-Chart with different subgroup sample size? I'm trying to build a chart for a production line, where at the end of the line a Quality inspector may: APPROVE or DISAPPROVE the item. At the end of every shift he could have, for example, 21 APPROVED and 3 DISAPPROVED. The sample size would be 24 (the total amounts of items), but for the next shift maybe 34 APPROVED and 5 DISAPPROVED, so the sample size (in this case the total of the items) differs from one shift to another. I noticed that the number of samples per subgroup is defined when the chart is initilized, but I can't find a way of setting a different sample size for each sample. I read the documentation and take a look at the examples, but I can't find it anywhere... Am I missing something? Thanks in advance. thanks in advace. [/quote]   Check here to include your profile signature.