D.E. Eckhardt

TL;DR: A condition under which a multiversion system is a better strategy than relying on a single version is given and some differences between the coincident errors model developed here and the model that assumes independent failures of component verions are studied.

TL;DR: The strategy of using multiple versions of independently developed software as a means to tolerate residual software design faults is discussed and the effectiveness of multiversion software is studied by comparing estimates of the failure probability of these systems with the failure probabilities of single versions.

TL;DR: The generalized median voter is introduced, which extends the thresholdless midvalue selection technique to arbitrary metric spaces and obviates most of the problems associated with inexact voting.

TL;DR: The second-generation experiment is a large-scale empirical study of the development and operation of multiversion software systems that has engaged researchers at five universities and three research institutes and an examination of multiple-version reliability improvement.

TL;DR: In a multiversion software experiment, twenty programs were built to the same specification of an inertial navigation problem and subjected to a three-phase testing and debugging process: an acceptance test, a certification test, and an operational test.