In 1984, he initiated a research program which sought to supply the missing link between theory and application while working out an entirely consistent form of quantum theory. Along with contributions of several key colleagues, the project eventually resulted in what is now commonly called the consistent (or decoherent) history approach to quantum theory, now effectively studied and applied in several areas of the field of quantum mechanics.
In 1984, he began a research endeavor aimed at bridging theory and practice while developing an entirely coherent form of quantum theory. With contributions from several important collaborators, the project ultimately led to what is now known as the consistent (or decoherent) history approach to quantum theory, which is currently studied and applied in various areas of quantum mechanics.