Based on the result of data analysis, propose an optimal design (the best value for each design variable). To explore the optimal design, you can either add a mid-level value to the critical design variables, or modify the problem formulation by adding one more design variable.

Interaction Plot for Distance Fitted Means 1 Stop Angle * Start Angle Fulcrum * Start Angle 6 Start Angle - 1.0 1.0 4 Start Angle * Stop Angle Fulcrum * Stop Angle 6 Mean of Distance Stop Angle - 1.0 1.0 Start Angle * Fulcrum Stop Angle * Fulcrum 6 Fulcrum -1.0 1.0 4 2 -1 -1 Start Angle Stop Angle Fulcrum Interaction Plot for Distance Fitted Means 1 Stop Angle * Start Angle Fulcrum * Start Angle 6 Start Angle - 1.0 1.0 4 Start Angle * Stop Angle Fulcrum * Stop Angle 6 Mean of Distance Stop Angle - 1.0 1.0 Start Angle * Fulcrum Stop Angle * Fulcrum 6 Fulcrum -1.0 1.0 4 2 -1 -1 Start Angle Stop Angle Fulcrum