1. A method for use with an automated supply chain optimizer that optimizes a supply chain subject to at least one user demand and one or more corresponding constraints, the method providing information regarding an unsatisfied demand, the method comprising: relaxing a constraint that potentially corresponds to the unsatisfied demand; controlling the optimizer to re-optimize the supply chain using the relaxed constraint; determining whether the demand was satisfied during re-optimization; and providing information to the user regarding the cause of the unsatisfied demand based on whether the demand was satisfied during re-optimization using the relaxed constraint.