# Evaluation functions composition

Composition offer the possibility to build an overall new kind of `TEval` from the succession of 
many others. It defines an ordered sequence of evaluation functions. One important thing to notice is 
that composition does not deal with distribution even if it is possible. It just applies sequentially 
all assessors and become really helpfull as the output of an assessor at the i-Th rank can be used as 
input for the next assessor, the (i+1)-Th one. This is one by creating a `TComposeEval` object as 
discussed briefly below.

```{toctree}
eval_function_composition/tcomposeval
```