def build(self, **kwargs):
        """ create the operation and associate tasks

        :param dict kwargs: operation data
        :return: the controller
        :rtype: kser.sequencing.controller.OperationController
        """
        self.tasks += self.compute_tasks(**kwargs)
        return self.finalize()
create the operation and associate tasks

        :param dict kwargs: operation data
        :return: the controller
        :rtype: kser.sequencing.controller.OperationController