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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dear Crispin, and all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>It seems the Western Electric Rule (WER) is
used when 1) we think we are ready to put all the systems together and want to
determine if they work combined or 2) We want to convince (prove to) some NGO that
we need money funded into an international stove QC program so to move forward.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>From what I could understand (way over my
head in many parts) is this looks at nothing more than ‘noise levels’
of a system. We have enough (IMO) in each segment of the systems to work on
first before there is a reason to put all systems together and look at the
whole. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> The small part that I look at
(biomass fuel) is not even quantified for ranges of parameters for any of the
stoves developed. Moisture, particle size and description, particle density,
proximate analysis and their ranges need to be researched per stove to market
that stove for a fuel area and compare that stove against others marketed for
the same fuel criteria. That noise level in itself is enough to make the WER
pointless to look at. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Frank<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>fes<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal style='margin:0in;margin-bottom:.0001pt'><b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
stoves-bounces@lists.bioenergylists.org
[mailto:stoves-bounces@lists.bioenergylists.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Crispin Pemberton-Pigott<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, March 10, 2011
6:53 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Stoves<br>
<b><span style='font-weight:bold'>Cc:</span></b> Steve Garrett<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Stoves] Western Electric
- rules for analysis of divergence</span></font><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-CA style='font-size:
11.0pt'>Dear Friends<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-CA style='font-size:
11.0pt'>One of the pressing needs on Planet Stoves is a way to rate the
performance of test protocols. As is well known by now the lab tests used thus
far, a combination of thermal efficiency when boiling and a simmering task,
have not been able to predict field performance. This is a pretty serious
failing and has required the implementation of measures to deal with it.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-CA style='font-size:
11.0pt'>Program managers and product choosers usually only have access to
lab-based water boiling tests because that is what people have concentrated on
performing, even though there is no statistically significant correlation
between the WBT lab results and field performance. Rob Baylis presented a paper
saying exactly this at ETHOS a few year ago. It is unlikely that the
problem is the stove.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-CA style='font-size:
11.0pt'>There are rules called Western Electric Rules for deciding if the
performance of a system is within specification, and in that case I am
referring to the test method as a system. If the results of the system, a
series of lab tests on a stove does not match field use, and the difference
between the evaluation and the field is large, and variable, then the use of the
Western Electric Rules might provide a means of testing the different test
methods.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-CA style='font-size:
11.0pt'><a href="http://en.wikipedia.org/wiki/Western_Electric_rules">http://en.wikipedia.org/wiki/Western_Electric_rules</a><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-CA style='font-size:
11.0pt'>Regards<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-CA style='font-size:
11.0pt'>Crispin<o:p></o:p></span></font></p>
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