Design Explorer Definitions

Feasible Design

A feasible design is a design that has a relative constraint violation less than or equal to loostol.

Infeasible Design

An infeasible design is a design that has a relative constraint violation greater than loostol.

Best Design

If at least one feasible design has been found, the best design is the feasible design with the best objective value. If no feasible designs have been found, the best design is the design with the smallest relative constraint violation.

Least Infeasible Point (LIP)

The Least Infeasible Point (LIP) is the infeasible point that has the best objective function value among all infeasible points that have relative violations less than the value of pllrlax*loostol. If one or more feasible points have been found, the LIP always has a better objective value than the best feasible point.

Search Step

A search step consists of a set of gradient based optimization runs using the surrogate models (Task 3), the execution of your analysis code (Task 4), and the subsequent refining of the surrogate models (Task 5).

Improved Design

SEQOPT has found an improved design if it finds either a new Best Design or a new Least Infeasible Point.