Clearing rubble

[Green]

I've always approached the percentage chances in the parameter data dialogue as a chance per unit, not the chance per hex (regardless of the number of units involved). If it's a check per hex, that would explain a lot of what I'm seeing in my Japan games.

9 companies with a 5% chance each to clear RUBBLE should on average be able to clear RUBBLE in a couple of turns, but that's not what I'm seeing. I thought the randomness came from the 5% number being for battalions (just like some other checks are made at 0.33 or 0.66 times a certain value for a single company or a combined unit of two companies compared to a modifier of 1 for a battalion).

That also brings up the question of which percentage-based checks are actually calculated for each unit. If, say, digging in simply uses the highest digging in percentage for a certain unit/stack in a hex (such as a combination of 3 non-engineer units and an engineer unit), that would make it pointless to have stacks dig in for situations where there's either no or a very low chance that the units digging in will be Disrupted. 

I know that only 1 check is made each turn to reduce mines in a hex by 1 density point, regardless of the number of engineer units, but that's a very "binary" action: the unit can either clear mines by reducing the minefield by 1 density point and does so, or can't and doesn't. No other outcome is possible, and no percentages are involved.

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The rubble fire value itself might also not be accurate in some titles. It's usually either 1000 or 10000, which makes me suspect one of those is a typing error when filling in the data.

My assumption has always been that for a given hex, each unit that is digging in is checked separately and the result will be a success if any of the units are successful. I am not sure but it would be easy enough to test so I will have a look at some point.

Nor am I sure if 10000 is a typo or not. A rubble fire value of 1000 is the norm but I wonder if 10000 would actually make more sense?