"Building the Decision" is the step in the MDQ Decision Model where:

Question $3$ options:

we finally determine what is the decision that needs to be made.

we determine if this is a problem$-$solving situation or decision$-$making situation.

we decide if the decision is worth finding a solution because otherwise building a decision makes no sense and just wastes resources.

we must conduct research, collect$/$evaluate relevant data$/$facts and determine possible choices suggested by the decision statement.