Standard Enumerations
Design Assurance Levels (DAL A-E) — Criticality classifications assigned to failure conditions and functions based on the severity of their effects. DAL A is most critical; DAL E is least critical. Drives verification and documentation rigor. Failure Condition Classification — Categories for failure condition severity: Catastrophic, Hazardous, Major, Minor, and No Effect. Determines mitigation strategy and certification evidence requirements. Failure Mode Severity — FMEA severity ratings (1–10 scale) indicating the impact of a failure mode on system safety and function. Used in RPN (Risk Priority Number) calculations for SFMEA and DFMEA. Failure Mode Occurrence — Probability or frequency ratings (1–10 scale) for how often a failure mode is expected to occur. Combined with severity and detection for RPN scoring. Failure Mode Detection — Ratings (1–10 scale) for the likelihood that a failure mode will be detected before it reaches the customer or causes harm. Low detection scores indicate high-risk failure modes. Action Priority (AP) Levels — Priority classification for mitigation actions identified during FMEA and FTA. AP 1 (highest) through AP 4 (lowest) guide resource allocation and closure deadlines. Risk Control Type — Categories for control mechanisms: Design Control, Verification Control, Monitoring & Mitigation Control, and Administrative Control. Defines how hazards are managed across the development lifecycle. System Element Type Hierarchy — Taxonomy of system components: Hardware, Software, Firmware, Mechanical, Electrical, and Hydraulic. Enables allocation of failure modes and characteristics to design disciplines. Characteristic Type — Classifications for design characteristics tracked in DFMEA: Performance, Functional, Reliability, Safety, and Environmental. Links design features to failure modes and test cases. Security Assurance Level (SAL) — Security criticality levels (SAL 1–5) assigned to threats and security controls per DO-326A threat assessment. SAL 1 is least critical; SAL 5 is most critical.Key Features
- Standardized terminology across all analysis types (FHA, SFMEA, DFMEA, FTA, CCA, security)
- Aerospace-certified scales aligned with DO-178C, DO-254, ARP 4754A, and MIL-STD-882E definitions
- RPN calculation support for FMEA prioritization using severity, occurrence, and detection ratings
- Traceability integration linking enumerations through requirements, characteristics, and test cases
- Role-based filtering adapting enumeration views to safety engineer, design engineer, and certification workflows
- Consistency validation enforcing enumeration constraints at document submission and certification checkpoints
Enumeration Reference Structure
| Enumeration | Purpose | Used In | Typical Range |
|---|---|---|---|
| DAL | Function and failure condition criticality | FHA, PSSA, SSA | A (critical) to E (minimal) |
| Failure Condition Classification | Severity of consequences | FHA, PSSA | Catastrophic to No Effect |
| FM Severity | Impact magnitude | SFMEA, DFMEA, RPN | 1 (no impact) to 10 (catastrophic) |
| FM Occurrence | Likelihood of failure | SFMEA, DFMEA, RPN | 1 (remote) to 10 (frequent) |
| FM Detection | Probability of catching failure | SFMEA, DFMEA, RPN | 1 (certain) to 10 (impossible) |
| Action Priority | Mitigation urgency | SFMEA, DFMEA, risk tracking | AP 1 (urgent) to AP 4 (defer) |
| Risk Control Type | Mitigation mechanism | Safety assessment, design reviews | Design, Verification, Monitoring, Admin |
| System Element Type | Component category | System architecture, DFMEA | Hardware, Software, Firmware, Mechanical, etc. |
| Characteristic Type | Design property class | DFMEA, environmental qualification | Performance, Functional, Safety, Environmental |
| Security SAL | Threat criticality | Security assessment, DO-326A | SAL 1 (low) to SAL 5 (critical) |
How Enumerations Drive Analysis
Source References (dev)
Source References (dev)
Code:
.polarion/tracker/fields/systemElementType-enum.xml, systemElement-status-enum.xml (0.47) · .polarion/tracker/fields/designRequirement-subType-enum.xml, environmentalCategory-enum.xml, fta-gateType-enum.xml, cca-analysisType-enum.xml, controlType-enum.xml, riskControlType-enum.xml, verificationMethod-enum.xml, testLevel-enum.xml (0.45) · .polarion/tracker/fields/complianceObjective-standard-enum.xml, complianceObjective-status-enum.xml, complianceRequirement-complianceStatus-enum.xml, complianceRequirement-evidenceType-enum.xml (0.44) · .polarion/tracker/fields/resolution-enum.xml, .polarion/tracker/fields/changerequest-resolution-enum.xml, .polarion/tracker/fields/changerequest-status-enum.xml, .polarion/tracker/fields/work-record-type-enum.xml, .polarion/tracker/fields/yesno-enum.xml (0.43) · .polarion/tracker/fields/severity-enum.xml, status-enum.xml, priority-enum.xml, implementationStatus-enum.xml, riskSpecification-document-status-enum.xml (0.42) · .polarion/tracker/fields/mappings.xml (0.40) · .polarion/tracker/fields/hazard-hazardCategory-enum.xml, hazard-operationalPhase-enum.xml, hazard-acceptanceAuthority-enum.xml (0.37) · .polarion/tracker/fields/testCase-custom-fields.xml, desReq-custom-fields.xml, processStep-custom-fields.xml, characteristic-custom-fields.xml, systemElement-custom-fields.xml, commonCauseEvent-custom-fields.xml, riskControl-custom-fields.xml, task-custom-fields.xml, custom-fields.xml (0.37) · .polarion/pages/scripts/velocity/nextedy_solutions.vm (0.36) · .polarion/tracker/fields/complianceObjective-custom-fields.xml (0.36)