Simulation with P10 P50 P90 Values Simulation with P10 P50 P90 Values jhockhay (Petroleum) (OP) 25 Apr 13 21:25 When running a simulation using P10 P50 P90 values for the parameters, what weight do you give to each probability value? Thanks. RE: Simulation with P10 P50 P90 Values LittleInch (Petroleum) 29 Apr 13 05:06 Look up a definition of P10, P50 and P90 and you will find your answer. My motto: Learn something new every day Also: There's usually a good reason why everyone does it that way RE: Simulation with P10 P50 P90 Values jhockhay (Petroleum) (OP) 29 Apr 13 09:11 I am sorry. I do not think that I made myself clear. When using P10, P50 & P90 values in a simulation, you treat them as a 3 valued discrete distribution. I have hear that some people give a 25%, 50% and 25% weight respectively to the values and other give a 30%, 40% and 30% weight. I was looking into some insight to common practice.