On the grounds of the amendment of the Mexican Social Security Law of 1995, we discerned the need to implement a new actuarial model to valuate the financial situation of the Disability and Life Insurance (seguro de invalidez y vida (SIV)), according to the radical change in the pension scheme. Therefrom, we adjusted the existing actuarial models; however, eventually, the need and challenge of reconsidering the model arose in order to have a model that covered the changes taking place during the terms of the pension scheme.

The model was designed in 2005 and it was modified in 2009 and 2014; these modifications took place to facilitate the operation and update of the model, and in order to optimize the completion period. The model covers two big categories:

• The demographic projection of the covered patients, people with disability pensions, and workers deceased due to a non-work-related disease.
   
• The financial projection of the volume of wages, the annual expense flow per temporary pensions, the balance on individual accounts, and the constitutive and insured amounts.