About Design Parameters Initialization

Process adapters (for example, DOE and Optimization) initialize their design parameters using information from the general problem formulation for that adapter. For example, factors selected in a DOE adapter will use any defined lower and upper bound in the general problem formulation to define the range over which to vary the factor in the set of experiments. Similarly, the Optimization adapter will use the lower and upper bound information from the problem formulation to define the space in which the optimization algorithm is allowed to vary design variables and to define the feasible range for selected outputs (that is, constraints). The following sections explain how each individual process adapter initializes their design parameters using the information from the general problem formulation.

This page discusses:

See Also
How Optimization Process Composer Generates Problem Formulations
About Design Parameters Initialization
Defining Problem Formulations

DOE Adapter

The general problem formulation that you define (from the Parameters tab) is used to initialize the following DOE adapter design parameter attributes:

Factors

The Lower and Upper bounds specified on the input parameters in the general problem formulation are used as Lower and Upper levels for the factors.

Note: The values defined in the general problem formulation are true values for the parameter and might be internally converted to level values depending on whether the Relation attribute for the factor is set to values, %, or diff.

Responses

The objectives specified on output parameters in the general problem formulation are used to initialize the Objective attribute for corresponding selected responses. If the objective is defined to be a target, the target value from the general problem formulation is used to initialize the Target attribute. The Objective Weight from the general problem formulation is used to initialize the Weight attribute of any DOE objective.

Loop Adapter

The Loop adapter does not support problem formulations.

Optimization Adapter

The general problem formulation that you define (from the Parameters tab) is used to initialize the following Optimization adapter design parameter attributes:

Design Variables

The Lower Bound and Upper Bound specified on input parameters in the general problem formulation are used as Lower Bound and Upper Bound for design variables.

Constraints

The Lower Bound and Upper Bound specified on output parameters in the general problem formulation are used as Lower Bound and Upper Bound for constraints. The Bound Scale andBound Weight from the general problem formulation are used to initialize the Scale and Weight attributes of any defined constraints.

Objectives

Any parameter that has an objective defined in the general problem formulation will be initialized automatically as an objective with the objective direction (minimize/maximize/target) as specified in the general problem formulation. If the parameter is an input parameter, it will also be initialized as a design variable because optimization requires that it be able to be varied if it is an objective. The Objective Scale and Objective Weight from the general problem formulation are used to initialize the Scale and Weight attributes of any defined objective.