[Stoves] Spider diagram applied to Stove variables

Richard Stanley rstanley at legacyfound.org
Wed Mar 12 09:38:04 CDT 2014


Amigo, 
Which diagram ? The one of my imagination, or the geologist's rose diagram or the one provided initially by Crispin? 
Richard, Nicaragua

On Mar 12, 2014, at 8:27 AM, Inversiones Falcon wrote:

Dear Richard will you send me back the diagram

Best Regard

Gus


On Tuesday, March 11, 2014 2:16 PM, Richard Stanley <rstanley at legacyfound.org> wrote:
Paul, 
Its similarly applied in Geology: Our closest approximation at a basic level was what we used to call a Rose diagram for assessing fault strike direction and intensity, although the spider diagram is far more versatile.  I was playing bureaucrat  in suggesting the addition of a  a temporal dimension as well. 
Never let a good thing alone when you can obfuscate it eh ? 
Richard


On Mar 11, 2014, at 1:31 PM, Paul Anderson wrote:

Dear all,

1.   Richard, THANK YOU for changing the Subject line so we know what is being discussed.

2.  My professional career as a university professor including teaching cartography (mapping), in which symbols and graphics were much emphasized.   We want our graphics about stoves to be useful and accurate.     Some pointers which are MY thoughts and are not standardized anywhere:

a.  The spider graph is very appropriate.   Do a Google search of     spider graph     and see a few dozen examples.   

b.  the outer edge (perimeter) is probably best for the most favorable reading because it is more difficult to read the values that are all in close to the center.   And we assume that many stoves will eventually get in close to  the center.

c.  ALL of the scales should increase IN DESIRABILITY from the center toward the periphery.   That means that low CO emissions (0.0) is at the edge and absurdly high is in the center.   And efficiency numbers are high at the edge and zero at the center.   Otherwise the visual clarity of "goodness" is jumping into the center and back out again with each different variable.

d.  There is no need for the same "scale" to be along each radial line.    Some are integral numeric.   Others can be rankings as numbers, and some could be in a word scale (but should at least have ordinal ranking).   

e.   Crispin gave a great list of variables
> 
> Social science metrics include preferences, fuels, controllability, lighting time, ease of learning to use it, appearance, comparison with other products such as traditional stoves or competing improved stoves, working life, ease of maintenance, ability to accommodate a range of pots or multiple pots, price, installation cost, transport to the home issues, attention demand, fuel preparation requirement, safety concerns, space heating, light casting, clothes drying ability, fuel drying ability, thermal mass heat storage, fuel flexibility and many others relating to opinions of users or observers. Perception of modernity is another.
Plus there are the physical science metrics whether measured in the Lab or in the Field (therefore TWO sets for each), and we hope that they are similar results, but the spider graph would help point out the differences.

3.  To make this all useful for evaluation of stoves, we really need some efforts and some examples and much discussion.   It will take a while to get something (multiple things) established.

Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD  
Email:  psanders at ilstu.edu   
Skype: paultlud      Phone: +1-309-452-7072
Website:  www.drtlud.com
On 3/11/2014 1:25 PM, Richard Stanley wrote:
> Crispin,
> Nice array &  clever BUT...
> Even with added variables mentioned,  its a static picture --a summary at best. 
> It does not tell the story thru time…
> Richard
> 

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