The Defense Advanced Research Projects Agency (DARPA) is seeking information on approaches, tools, and practices for achieving graduated levels of software resilience and assurance aligned to mission needs, cost, and lifecycle constraints. The agency is looking for input on how to define, implement, measure, and sustain software assurance across development, sustainment, and modernization activities. Respondents should provide information on technical approaches, analyses, and recommendations for achieving graduated levels of software assurance. The agency is also seeking input on artifacts and toolchains, incremental adoption and composition, operational and economic considerations, and transition and acquisition implications. • The agency is looking for input on how to structure graduated levels of software assurance • Respondents should provide information on technical approaches and analyses for achieving software assurance • The agency is seeking input on artifacts and toolchains, incremental adoption and composition, and operational and economic considerations • Respondents should provide recommendations for how graduated assurance levels can be incorporated into government acquisition, sustainment, and supply chain processes