  The large amount of information and the increasing complexity of applications
constrain developers to have stand-alone and reusable components from libraries
and component markets.Our approach consists in developing methods to evaluate
the quality of the software component of these libraries, on the one hand and
moreover to optimize the financial cost and the adaptation's time of these
selected components. Our objective function defines a metric that maximizes the
value of the software component quality by minimizing the financial cost and
maintenance time. This model should make it possible to classify the components
and order them in order to choose the most optimized.
  MOTS-CLES : d{\'e}veloppement de m{\'e}thode, r{\'e}utilisation, composants
logiciels, qualit{\'e} de composant
  KEYWORDS:method development, reuse, software components, component quality .
