A type of scenario that is used to validate a model during decision impact model development, rather than during production. Specifically, this scenario is used to examine results for each of a set of possible treatments. Validation scenarios do not contain any objectives or constraints. The scenario uses all or some of the treatments defined for the project and computes metrics for each account using each treatment, creating a sub-scenario for each. This scenario is typically used in any of the following situations: 1) to validate the behavior of a decision impact model prior to running an optimization scenario, 2) to validate the behavior of other scenarios, and 3) to understand and explain results produced by those scenarios.