Why do QppD and QthD appear on the executive summary, but not the composite metric, QphD?
QppD and QthD have somewhat of a “physical” meaning and are good measures associated with two phases of the test and two important aspects of a decision support system. QphD is a composite which integrates the two tests in a balanced way but should be viewed mainly for comparison purposes and that is why it is presented only as the final score after the dollars have been factored in.
