Characteristic checks

[shankfisher]

Zaibatsu and the 2d6 Retro Sci-Fi rules say:
"To make a Characteristic roll, you must roll 2D6 and add one half of the characteristic score (round down). The aim is to gain a roll of 10 or more. That is a success. Characteristic checks tend to be all or nothing (you can either accomplish the task or you can't)."

CE says:
"To make a Characteristic check, you must roll 2D6 and add the appropriate characteristic score modifier. Characteristic checks tend to be all or nothing (you can either accomplish the task or you can't), although there are sometimes gradations of success or failure."

Mongoose 1e says:
"To make a check, the player rolls 2d6 and any appropriate Dice
Modifiers. If the total is 8 or more, the character succeeds."
"To make a Characteristic check, roll 2d6 and add the appropriate characteristic Dice Modifier."

What do you guys use? DM or half Characteristic for a check?

 

[aramis]

I used, in my last game, 2d6 + (Attribute ÷ 3)+(Attribute÷3) for TN by difficulty label, using the following difficulties
Easy 4
Routine 7
Challenging 10
Difficult 13
Formidable 16
Impossible 19
Absurd 22

Note that labels are for Skill 1 Att 7 basis on 1× Att/3 and 1× Skill. The actual construction is 2d6 + (Asset A) + (Asset B), where an asset is any of:
Attribute/3
Skill level
Terms of Service
Rank (Bk 1/MT Basic)
Special Duty total (MT Basic - number of Special Duty rolls passed)