  In this paper we summarize the main parts of the first exit time theory
developed in connection to the life table data and the resulting theoretical
and applied issues. Several new tools arise from the development of this theory
and especially the Health State Function and some important characteristics of
this function. Special attention has being done in the presentation of the
health state function along with the well established theory for the Force of
Mortality and the related applications as are the life tables and the
estimation of life expectancies. A main part of this work is the formulation of
the appropriate non-linear analysis program including a model which provides an
almost perfect fit to life table data. This model, proposed in 1995 is now
expanded as to include the mortality excess for the age group from 15-30 years.
A version of the program is given in Excel and provided at the website:
http://www.cmsim.net
