For more information regarding the Automated Combinatorial Testing for Software (ACTS), please visit the Computer Security Resource Center (CSRC)..
Combinatorial testing is a proven method for more effective software testing at lower cost. Line Graph showing Cumulative percent of software failures. The key insight underlying combinatorial testing’s effectiveness resulted from a series of studies by NIST from 1999 to 2004. NIST research showed that most software bugs and failures are caused by one or two parameters, with progressively fewer by three or more. This finding, referred to as the interaction rule, has important implications for software testing because it means that testing parameter combinations can provide more efficient fault detection than conventional methods. New algorithms compressing combinations into a small number of tests have made this method practical for industrial use, making it possible to do better testing at lower cost.