The methods
Several robust optimization methods was implementrd in Numpress System :
- Safety Margin approach
- Basic
- Dual response surface
- Total approximation
Analysis parameters
Robust optimization management is very similar to deterministic Optimization. so parameters dialogs will be presented only. Left side of dialogs allows to select method type and its parameters. Right side list consists of two list placet int tabs. One list is used to select objective function with it's parameters second. Second list constraints with parameters can be choosen. Booth tabs are presented below:


Variable selection
Determination of set of variables is curcial for optimization problem statement. Often fast reduction of random variables set is needed. Excluded variable is replaced by constant. Doe exclude variable form analysis click on "variables" tree subitem. Desribed below dialog box will apear:

if particular variable is selected it will be used in the analysis. If not constant value will be used taken from secong column.Note that: Set of dependent variables is setermined automatically by selecting function. This window will be empty if no function is selected. So user can eliminate a variable only. To add a variable, definition of limit state function have to be enriched. Variable selection is applicable to all reliability methods.
Starting point
Starting point gives possibility to determine point algorithms starts. It is importand especially in deterministic optimization algorithm used in robust optimization. In some cases (complex shape of response function) it may help to determine minimum if starting point is entered manually by user. Coordinates of starting point user can ender in dialog box showed below:

Dialog box gives also possibility to choose space for starting point: oryginal (X) or standard normal (U).
Optimization parameters
To select optimization algorithm proper tab should be clicked in dialog box depicted below:

Each tab consist of method parameters