Talk:Process window index: Difference between revisions

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== Content ==

|action1date=21:39, 23 January 2009 (UTC)

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:*Much of the original content seems directly copied from http://www.kicthermal.com/products/pwi-ds.html?cat=0 (towards end of page). Most webfinds seem to derive from literature from a single company, so is this thing generally used? It does seem generally applicable in quality control and statisticas provided a more general context can be supplied.

|topic=engineering

:*Can anyone explain the "+2" in the formula? This seems to rely on the units being of a certain type.

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[[User:Melcombe|Melcombe]] ([[User talk:Melcombe|talk]]) 10:36, 30 October 2008 (UTC)

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::Its divided by 2. The dots on the division sign are not very clear. [[User:Zithan|Zithan]] ([[User talk:Zithan|talk]]) 12:53, 8 November 2008 (UTC)

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::[http://www.accessmylibrary.com/coms2/summary_0286-834890_ITM This] might answer 1. [[User:Zithan|Zithan]] ([[User talk:Zithan|talk]]) 13:00, 8 November 2008 (UTC)

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== ContentIssues ==

Just minutes ago I found in this article a passage that read as follows:

----

<math>

\text{PWI} = 100 \times \max_{i=1\dots N \atop j=1\dots M}

\left\{\left|

\frac{measured\_value_{[i,j]} - average\_limits_{[i,j]}} {range_{[i,j]}/2}

\right|\right\}

</math>

Where:<ref name="SMT" />

: i = 1 to N (number of thermocouples)

: j = 1 to M (number of statistics per thermocouple)

: measured_value [i,j] = the [i,j]^th statistic's value

: average_limits [i,j] = the average of the [i,j]^th high and low limits of the statistic

: range [i,j] = the [i,j]^th high limit minus the low limit of the statistic

----

I changed it to say this:

----

: <math>

\text{PWI} = 100 \times \max_{i=1\dots N \atop j=1\dots M}

\left\{\left|

\frac{\text{measured value}_{[i,j]} - \text{average limits}_{[i,j]}} {\text{range}_{[i,j]}/2}

\right|\right\}

</math>

Where:<ref name="SMT" />

: ''i'' = 1 to ''N'' (number of thermocouples)

: ''j'' = 1 to ''M'' (number of statistics per thermocouple)

: measured value [''i'',&nbsp;''j''] = the [''i'',&nbsp;''j'']^th statistic's value

: average limits [''i'',&nbsp;''j''] = the average of the [''i'',&nbsp;''j''']^th high and low limits of the statistic

: range [''i'',&nbsp;''j''] = the [''i'',&nbsp;''j'']^th high limit minus the low limit of the statistic

----

One lesson is that whatever it takes to get nominated to be a "Good Article", it doesn't required much attention to standard Wikipedia style conventions. Then I corrected two links in the opening section in which every word began with an incorrectly capitalized initial letter.

:

So now I'm wondering: why does every word in the title phrase begin with a capital letter? [[User:Michael Hardy|Michael Hardy]] ([[User talk:Michael Hardy|talk]]) 04:01, 26 December 2008 (UTC)

:Hi Michael, thank you for the fixes and article review. The text was in capitals because I had initially thought these were proper nouns &ndash; at least in some of the books I have with me, they were. Now that you mention it, I did verify them, and have changed these to lower case. Regards, [[User:Zithan|Zithan]] ([[User talk:Zithan|talk]]) 15:06, 26 December 2008 (UTC)

Hello. When I said "the title phrase", I meant the phrase that is the title of the article: '''Process Window Index'''. Why do those three words have capital initial letters? [[User:Michael Hardy|Michael Hardy]] ([[User talk:Michael Hardy|talk]]) 18:22, 26 December 2008 (UTC)

::ItsNot divided by 2sure. TheThat's dots onwhat the division sign are not verysources clearsay. [[User:Zithan|Zithan]] ([[User talk:Zithan|talk]]) 1218:5337, 82 NovemberJanuary 20082009 (UTC)