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TDA-05.5: Software Design Root Cause Analysis (RCA)

TDA 5 — Medium Protect

Mechanisms exist to assess software design processes that includes: (1) Conducting Root Cause Analysis (RCA) to identify the underlying causes of issues or failures; (2) Developing actions to address the root cause of the issue or failure; and (3) Implementing the actions and monitoring the implementation for effectiveness.

Renumbered: Formerly TDA-06.6 in SCF 2025.4.

Control Question: Does the organization assess software design processes that includes: (1) Conducting Root Cause Analysis (RCA) to identify the underlying causes of issues or failures; (2) Developing actions to address the root cause of the issue or failure; and (3) Implementing the actions and monitoring the implementation for effectiveness?

General (7)
Framework Mapping Values
CIS CSC 8.1 16.3
CIS CSC 8.1 IG2 16.3
CIS CSC 8.1 IG3 16.3
IEC 62443-4-1 2018 DM-4 DM-4(a-1) DM-4(a-1)(1) DM-4(a-1)(2) DM-4(a-1)(3) DM-4(a-1)(4) DM-4(b-1) DM-4(c) DM-4(d) DM-4(a-2) DM-4(b-2)
MPA Content Security Program 5.3.1 TS-1.13
NIST 800-53 R5.2 SI-02(07)
NIST 800-82 R3 SI-02(07)
US (1)
Framework Mapping Values
USA California CCPA 2025 7123(c)(14)
APAC (1)
Framework Mapping Values
APAC Australia ISM June 2026 ISM-1909

Capability Maturity Model

Level 0 — Not Performed

Practices are non-existent, based on the inability to demonstrate an implemented and operational capability. A reasonable person would conclude the control is not being performed.

Level 1 — Performed Informally

Technology Development & Acquisition (TDA) domain capabilities are ad hoc and inconsistent. Capability criteria associated with this control may include: ▪ Policies, standards & procedures associated with TDA domain capabilities provide limited coverage due to the depth and breadth of the existing documentation. ▪ Technology development & acquisition-related activities are decentralized (e.g., a localized/regionalized function) and uses non-standardized methods to implement secure, resilient and compliant practices. ▪ Secure development practices loosely conform to industry-recognized standards for secure engineering (e.g., OWASP, NIST SP 800-218 and NIST SP 800-160).

Level 2 — Planned & Tracked

Technology Development & Acquisition (TDA) capabilities are requirements-driven, but are not standardized across the entity (e.g., local/regional level consistency). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with TDA domain capabilities are formally documented and centrally-managed by the entity. ▪ Standardized Operating Procedures (SOP) associated with TDA domain capabilities are documented and maintained by process owners. ▪ IT and/or cybersecurity personnel work with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with TDA domain capabilities to address applicable statutory, regulatory and/or contractual requirements for Technology Assets, Applications, Services and/or Data (TAASD). ▪ Technology development and acquisition-related controls are primarily administrative and preventative in nature (e.g., policies, standards and procedures & guidelines). ▪ Technology development and acquisition management may be a defined function (e.g., team or department) or assigned as an additional duty to existing IT and/or cybersecurity personnel. ▪ Secure development practices mostly conform to industry-recognized standards for secure engineering of Technology Assets, Applications and/or Services (TAAS) (e.g., OWASP, NIST SP 800-218 and NIST SP 800-160). ▪ An application development team, or similar function, uses a structured process to design, build and maintain secure configurations for test, development, staging and production environments.

Level 3 — Well Defined

Technology Development & Acquisition (TDA) capabilities are standardized across the entity for applicability to People, Processes, Technologies, Data and/or Facilities (PPTDF) to ensure consistency for Technology Assets, Applications, Services and/or Data (TAASD). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with TDA domain capabilities are formally documented and centrally-managed by the entity's Governance, Risk & Compliance (GRC) team, or similar function. ▪ Standardized Operating Procedures (SOP) associated with TDA domain capabilities are well-documented and kept current by process owners. ▪ A software development team, or similar function, is appropriately staffed and supported to implement and maintain TDA domain capabilities. ▪ Technology is leveraged to enhance the efficiency and accuracy of technology development and acquisition management (e.g., project management software, software escrow solution and software testing tools). ▪ The entity's Governance, Risk & Compliance (GRC) team, or similar function, works with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with TDA domain capabilities to address Minimum Compliance Requirements (MCR) (e.g., applicable statutory, regulatory and/or contractual requirements) and Discretionary Security Requirements (DSR) (e.g., entity-required controls). ▪ An implemented and operational capability exists to assess software design processes that includes: (1) Conducting Root Cause Analysis (RCA) to identify the underlying causes of issues or failures; (2) Developing actions to address the root cause of the issue or failure; and (3) Implementing the actions and monitoring the implementation for effectiveness.

Level 4 — Quantitatively Controlled

Utilize SCR-CMM Level 3 criteria definitions: ▪ There are no defined Level 4 criteria, since it is reasonable to assume a quantitatively-controlled process is not necessary to operationalize this control. ▪ While it may be possible to develop “metrics-driven” capabilities for this control, the criteria would be organization-specific to define.

Level 5 — Continuously Improving

Utilize SCR-CMM Level 3 or Level 4 (if available) criteria definitions: ▪ There are no defined Level 5 criteria, since it is reasonable to assume a continuously-improving process is not necessary to operationalize this control. ▪ Level 5 capabilities should be considered “world-class” where the control builds on Level 4 capabilities, but are continuously improving through Artificial Intelligence (AI) and/or Machine Learning (ML) technologies. ▪ While it may be possible to develop responsive capabilities for this control through the use of AI and/or ML technologies, the criteria would be organization-specific to define.

Assessment Objectives

  1. TDA-05.5_A01 software design processes include conducting Root Cause Analysis (RCA) to identify the underlying causes of issues or failures.
  2. TDA-05.5_A02 software design processes include developing actions to address the root cause of the issue or failure.
  3. TDA-05.5_A03 software design processes include implementing the actions and monitor the implementation for effectiveness.

Evidence Requirements

E-TDA-05 Failure Mode and Effect Analysis (FMEA)

Documented evidence of an engineering method designed to define, identify, and present solutions for system failures, problems, or errors.

Technology Design & Acquisition

Technology Recommendations

Micro/Small

  • Note: Typically not required at this size; note lessons learned from defects

Small

  • Root Cause Analysis (RCA) for significant software defects
  • Lessons learned applied to design practices

Medium

  • RCA process for security defects with design process improvements
  • Defect trend analysis

Large

  • Formal RCA and design process assessment program
  • Defect data analytics to identify systemic design weaknesses
  • Continuous improvement of the SSDP

Enterprise

  • Enterprise software quality and security RCA program
  • Design process maturity assessments (e.g., OWASP SAMM, BSIMM)
  • Metrics-driven SSDP improvement

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