# Talk:Process Window Index

Process Window Index was a Engineering and technology good articles nominee, but did not meet the good article criteria at the time. There are suggestions below for improving the article. Once these issues have been addressed, the article can be renominated. Editors may also seek a reassessment of the decision if they believe there was a mistake.
 January 23, 2009 Good article nominee Not listed
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## Issues

$\text{PWI} = 100 \times \max_{i=1\dots N \atop j=1\dots M} \left\{\left| \frac{measured\_value_{[i,j]} - average\_limits_{[i,j]}} {range_{[i,j]}/2} \right|\right\}$

Where:[1]

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:

$\text{PWI} = 100 \times \max_{i=1\dots N \atop j=1\dots M} \left\{\left| \frac{\text{measured value}_{[i,j]} - \text{average limits}_{[i,j]}} {\text{range}_{[i,j]}/2} \right|\right\}$

Where:[1]

i = 1 to N (number of thermocouples)
j = 1 to M (number of statistics per thermocouple)
measured value [ij] = the [ij]th statistic's value
average limits [ij] = the average of the [ij']th high and low limits of the statistic
range [ij] = the [ij]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? 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 – 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, 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? Michael Hardy (talk) 18:22, 26 December 2008 (UTC)

Not sure. That's what the sources say. Zithan (talk) 18:37, 2 January 2009 (UTC)
• ^ Cite error: The named reference SMT was invoked but never defined (see the help page).