Quantum measurement, detection and locality

According to Bell's theorem, local realism is incompatible with quantum theory. However, it depends on an implied assumption about quantum measurement. We suggest that the assumption might be removed by a complete quantum analysis of the interaction between the measured system and measuring apparatus of a Bell experiment using Born's statistical interpretation. But it is conceivable that analysis of all possible Bell experiments would allow compatibility of quantum theory and local realism. The difficulties of theory and experiment are closely related.