Requirements Formulation

Performance Trade-off creates the requirements formulation from a combination of a parameter's priority and objectives along with any threshold values you assigned.

You display the requirements view of a parameter by selecting Edit from the Requirements column.

The parameter formulation includes the following:

Priority

Performance Trade-off uses the priority to set the weight factor of a parameter.

You can assign a parameter a priority between 1 and 5, where 1 is the highest priority and 5 (default) is the lowest priority. You can also assign a priority of MH, indicating a must-have parameter. A must-have priority has the same weight as 1; however, if the threshold is not met, the entire alternative is penalized with a score of zero.

Objective
Performance Trade-off uses the objectives to assess the feasibility and to calculate the score and rank of the different alternatives. You can choose an objective that tries to minimize or maximize the value of a parameter. Alternatively, you can choose an objective that tries to target the value of a parameter to a specified number.

Note: You can assign an objective to only a numerical parameter.

Threshold values
You can assign a parameter upper and lower threshold values. If the value of a parameter is greater than the upper threshold or lower than the lower threshold, the corresponding data point is still scored and ranked; however, it is considered infeasible. Infeasible data points are indicated with the infeasible icon in the data table.

Performance Trade-off displays the range of values for a parameter after you save the analytics case and refresh your display.

Note: You can assign a threshold value to only a numerical parameter.