  In this paper we provide a general account of the causal models which attempt
to provide a solution to the famous measurement problem of Quantum Mechanics
(QM). We will argue that --leaving aside instrumentalism which restricts the
physical meaning of QM to the algorithmic prediction of measurement outcomes--
the many interpretations which can be found in the literature can be
distinguished through the way they model the measurement process, either in
terms of the efficient cause or in terms of the final cause. We will discuss
and analyze why both, 'final cause' and 'efficient cause' models, face severe
difficulties to solve the measurement problem. In contradistinction to these
schemes we will present a new model based on the immanent cause which, we will
argue, provides an intuitive understanding of the measurement process in QM.
