We present observer-based controller designs for decentralized systems that are reliable to sets of control-channel outages. The designs guarantee stability and aH∞norm bound on the closed-loop system despite complete sensor or actuator outages for any subset of a preselected set of control channels. The results are presented in a unified discrete/continuous setting. We show how the continuous-time and discrete-time results can be generated from the unified formulation and present an algorithm for solving the discrete-time design equations by making use of the delta-operator formulation.