# Problem definition

This module extends the {{Reopt}} module and is kept in a separated module because of its dependency 
with the {{Model}} module. Its use follows the same structure and is also based on the {{Relaun}} 
architecture. Having that in mind, it is suggested to have a look at [](#relauncher_module) and at
[](#reoptimizer_module) for a better understanding. As it uses a kriging model, it is also suggested 
to look at [](#modeler_kriging).

The principal difference is in the solver definition: we have to define the kriging model and its 
construction parameters; and to use an adapted optimization solver.

```{toctree}
problem/tego
problem/tego_modeler
problem/tego_solver
```