Each independent variable has equal weight because if any variable is absent (0), the prospect is a failure; if all variables are present (1.0), the prospect is a commercial success. Therefore, each independent variable can be evaluated on a scale of zero to one (0–1.0). Exploration risk is determined by multiplying the three variables: charge, trap, and timing. | Each independent variable has equal weight because if any variable is absent (0), the prospect is a failure; if all variables are present (1.0), the prospect is a commercial success. Therefore, each independent variable can be evaluated on a scale of zero to one (0–1.0). Exploration risk is determined by multiplying the three variables: charge, trap, and timing. |