Browser width is too narrow.

Rotate the screen or increase the width.

Modeling with Free Pascal

Modeling is an effective approach for obtaining results when an exact formula does not exist.

OpenSIMPLY is free software for modeling in Free Pascal.

OpenSIMPLY uses discrete-event approach for modeling.

OpenSIMPLY is an open source simulation modeling software.

Creating your own models in Free Pascal is very easy, you may only need a few lines!

If you prefer Delphi, read here, OpenSIMPLY supports Delphi as well.