Preprocessing
===================

The preprocessing stage includes preparatory steps leading up to the matrix :ref:`Estimation` to produce a transition matrix (or matrix set).

The precise steps required depend on the sources of data, the nature of data, use specific requirements (best practices, regulation etc) and, not least, the desired estimation method.

.. toctree::
   :maxdepth: 2

   data_formats
   state_spaces
   cohorts