Only having global stockpiles is a possiblity and will work out fine.
I favor local stockpiles for the following reasons:
1: When there is a shortfall, it makes sense for producing planets and planets in the same system to have first dibs. A farming world should starve itself or it's immediate neighbors to feed a random world half a galaxy away.
2: When a planet is conquered, it makes sense for a portion of your accrued resources to be lost. Local stockpiles help determine how much is lost. Otherwise, a mightly empire reduced down to a single world will still have a huge stockpile of resources. As a tangent to this, it would be nice to know how much an enemy can capture in a raiding mission. If they hit the same world reaptely, eventually the local stockpile should be depleted.
3: The player never (or rarely) has to directly deal with local stockpiles. He can gauge the health of his empire from global consumption and stockpiles--so despite the added detail, the system still seems just as simple to the end user.
Regarding the word document: save and post it as html somewhere (geocities is you have to).
Though, to be honest, I wouldn't waste too much time on it. The chances of getting a consenus on a scripted build queue is pretty slim--but maybe it's something the AI team would be interested in using.
IF the Local Reserves
are always assumed on planets with excess production then the player should never be aware of them. If the player is never aware of them then just let them be handled by the program in some nominal way and or forget about them altogether.
Once your planet starts producing excess food and or minerals just let the Excess be sold to your Empire and doled out from there. If for some reason a planets production falls below its needs it gets in line just like all of the rest of the planets that can't feed itself or keep its industries supplied with minerals. The situation should self correct if the planet has the resources.
BTW my BQM handles this very nicely... IMO.
As for loosing resources when a planet is conquered... I think the loss of the planet should be enough. I wouldn't worry about a few cents worth of food or minerals! They've/You've just lost a whole planet and ALL of its production, research, and whatever facilities. On the other hand if They/You have just conquered a planet you've just gained all of its production, research, and whatever facilities.
IMO this is a KISS issue... Don't go kicking rocks in a mine field.