The software system allows to solve constrained nonlinear programming problems by an efficient sequential quadratic programming (SQP) method. A nonlinear objective function is to be minimized subject to nonlinear equality or inequality constraints. The numerical code is called NLPQL, which is frequently used in industry and academia. The mathematical method represents the scientific state-of-the-art.
Model functions are defined in a modeling language called PCOMP and are interpreted and evaluated during runtime. It is assumed that all nonlinear functions are differentiable. Gradients are computed automatically. EASY-OPT Express is particularly useful for classroom exercises of optimization courses or to become familiar with optimization routines before starting a real life implementation. The mathematical theory of the algorithm is described in the documentation and the usage of the system is outlined in detail.

Highly efficient sequential quadratic programming method (NLPQL)

Up to 200 variables and 1,000 nonlinear equality and inequality constraints

Flexible modeling language with automatic differentiation

Large number of standard test problems

GUI implemented in form of a database

Distribution free runtime version of Access 2007 included

User interface running under Windows XP and Vista, 2K version available on request

Interactive, context-sensitive help

Extensive documentation (pdf)

Numerical algorithms implemented in Fortran as a stand-alone code, executable outside of the GUI

Generation of reports and optimization history plots (Gnuplot)