Andy Podgurski, Wassim Masri, Yolanda McCleese, and Francis G. Wolff. Estimation of Software Reliability by Stratified Sampling . ACM Trans. on Soft. 263-283, July 1999. This paper presents a methodology to estimate operational software reliability by stratified sample of beta testers' code execution profiles.
Cluster analysis is used to group code executions into dissimilar profiles.
The authors show that more accurate estimates of failure frequencies can be drawn by stratified samples of those clustered execution profiles. 7.5 Optimized Set Reduction Lionel C. Briand, Victor R. Basili, and William Thomas. A Pattern Recognition Approach for Software Engineering Data Analysis. 931-942, November 1992. This paper introduces optimized set reduction.