# 3. How long are my Route optimizations kept?

Each route optimization performed in TourSolver is saved in a simulation. Simulations are then stored for a duration that will vary according to the validation cycle:

* A simulation that is **saved but not validated** is stored in TourSolver for **two months**
* A simulation that is **saved and then validated** is stored in TourSolver for **a year (12 months)**

A simulation can be validated in one of two ways:

* From the[ ](https://www.toursolver.com/en/faq/managing-simulations-toursolver)list of simulations accessible via the TourSolver Home page
* From the optimization results window in the Optimization page


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