Parameter variations, which are increasing along with advances in process technologies, affect both timing and power. Variability must be considered at both the circuit and microarchitectural design levels to keep pace with performance scaling and to keep power consumption within reasonable limits. This article presents an overview of the main sources of variability and surveys variation-tolerant circuit and microarchitectural approaches.
Unsal, O., Tschanz, J. W., Bowman, K., De, V., Vera, F.J., González, A., Ergin, O. Impact of parameter variations on circuits and microarchitecture. "IEEE micro", Desembre 2006, vol. 26, núm. 6, p. 30-39.