Re: Manipulation of MPJ Systems

[RACE --- <race@midusa.net>]

Thomas L. Murphy wrote:
> 
> Someone posted and asked about manipulation of MPJ systems.  One way is
> very simple:  If you know what judges a particular team will mark as "A"
> and which judges they will strike (assuming an A, B, C system), you can
> simply mark their strikes as "A" and their expected "A" judges as
> strikes or "C" to almost ensure a B-B selection, which works even better
> if the judges you would actually mark as "A" are marked as "B," right?

this only makes sense IF you know who you will be hitting AND you're 
certain they don't do the same thing.  main reason it happens some at 
ndt is the huge number of A's required b/c of 3 judge panels.
> 
> My understanding of MPJ is that a tournament director or computer
> program would first look for an A-A match, then a B-B and C-C before
> looking for a mixed match.
> 
> This sounds hypothetical, but I can tell you there is a lot of
> uniformity in how the top national circuit NDT teams rate judges,
> particularly as A, C and strike.

this is partly due to the size of ndt and the lack of regional circuits. 
 it seems that the size and diversity of ceda changes the nature to a 
much better system.  it seems that tuna's data would probably be more 
useful.

david rhaesa
> 
> -tlm

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References:

• Manipulation of MPJ Systems
• From: "Thomas L. Murphy" <tmurphy@swcp.com>

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