  We first review and critically examine some basic concepts and ambiguities
related to quantum mechanics and quantum measurement to understand the success
and shortcomings of current theories. We also touch on ideas regarding
expression of variables within a complex system. Then we discuss a model for
quantum measurement proposed by us, in which the quantum system is allowed to
interact with its image created within the detector, followed by a first
passage random walk in the Hilbert space. Definitions and ideas from the first
part are used in the context of the model. In the end, we discuss the puzzling
question of entanglement. We propose how borrowing concepts from our model for
quantum measurement may enable us to formulate a hidden variable scenario that
does not violate Bell's inequality.
