DI-SESS-81495C
Failure Modes, Effects, and Criticality Analysis
Identifies independent single item failures and their potential impact on mission success, performance, safety, and maintainability, establishing baseline engineering information for fault detection and isolation.
Approval DateSeptember 30, 2024
AMSC NumberN10487
Preparing ActivityAS
Project NumberSESS-2024-031
OPR—
DTIC ApplicableYes
GIDEP ApplicableYes
Limitation—
Applicable Forms—
Approval Limitation—
Form Version—
DID Formatfree_text
963C CompliantYes
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.
Application & Interrelationship
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Use & Relationship
The Failure Modes, Effects, and Criticality Analysis (FMECA) identifies independent single item failures and the resulting potential impact on mission success, performance, safety, and maintainability. The FMECA promotes corrective actions by identifying potential failure risk and maintainability issues in order that appropriate corrective actions may be taken early to eliminate or control high risk items to improve operational readiness and reduce life cycle cost. The FMECA also establishes the baseline engineering information to identify and eliminate or control all failure modes throughout the systems life cycle. The FMECA analytics establish the basis for fault detection, fault isolation, operator and maintainer failure recognition, depot test parameters and lay-in repair parts.
This Data Item Description (DID) contains the format, intended use information, and content preparation instructions for the data product generated by the specific and discrete task described in the solicitation, and should be tailored appropriately.
This DID supersedes DI-ILSS-81495B.
Preparation Instructions
1Reference documentsThe applicable issue of the documents cited herein, including their approval dates and dates of any applicable amendments, notices, and revisions, shall be as specified in the contract.
2FormatThe Failure Modes, Effects, and Criticality Analysis (FMECA) shall be in contractor's format.
3ContentThese data shall explicitly show and document the relationship of the FMECA to the systems architecture and engineering artifacts and analysis, as required by the contract statement of work, and shall include:
3.1Identification of how the FMECA aligns to the digital systems engineering environment
3.2Identification of the system overview, operational profile, scope, level of analysis, assumptions, summary of results, documentation of the data sources and techniques used in performing the analysis, and worksheets used during the analysisThe worksheets shall be organized to first display the highest indenture levels of the system. Sample worksheets for Failure Modes Effect Analysis (FMEA) and Criticality Analysis (CA) are shown in Figures 1 and 2, respectively not all inclusive.
3.3Analysis performed for all mission profile(s), under worst-case conditions, which shall document and relate all associated failure modes from the piece part (or lowest indenture level specified) through all indenture levels through the subsystem and system levels, as well as identifying severity levels (categories I through IV) for each indenture levelAll single-point failure modes shall be identified, evaluated and design mitigation documented.
3.4Identification of those failure modes which are detectable by Built-In-Test (BIT) and to what level they will be isolatedWhen failures are identified as undetectable but the failure has no effect on the mission, the consequences of a second, separate item failure shall be analyzed. For those cases in which the mission would be jeopardized by the second failure, it shall be determined whether or not a failure indication would now be evident to the operator, maintainer, or detectable by BIT. The report shall also identify failure modes that result in an out-of-tolerance condition or loss of functionality rather than a "hard" failure. The report shall identify the extent to which system monitoring and warning features will provide warning of impending failure, to facilitate corrective action during a preventive maintenance period.
3.5Identification of both the preventive maintenance provisions which would minimize the probability of occurrence and the corrective maintenance features which would minimize downtime in the event of occurrence, and a description of the methodology and controls used to ensure the preventive and corrective actions are adequate
3.6Identification and description of the hardware and software design provisions for maintenance by modular replacement, indication probable adjustment requirements following repair, and identification of the first point at which the post-repair checkout can be made to verify that the maintenance action is complete
3.7A description of the impact of the FMECA analysis on design, maintenance planning/supportability, and diagnosticsMajor problems detected by the analysis shall be detailed, including how the problems were resolved (e.g. design changes, etc), including impacts on safety, supportability, and diagnostics. Contractor rationale and comments concerning the analysis and identification of the critical items list and initiated or recommended actions for control of failure risk shall be included.
3.8A description of how the FMECA is used in and aligned to the Fault Tree Analysis (FTA), Reliability Centered Maintenance (RCM) analysis, Maintenance Task Analysis (MTA), and Level of Repair Analysis (LORA)
3.9Identification of information necessary for investigating root cause is identified and documented in FMECA to include
3.9.1The root cause(s) is identified
3.9.2Failure compensation based on appropriate technical or statistical analyses that fully address the root cause(s) mitigation
3.9.3A summary which shall include contractor conclusions and recommendations based on the analysis results and problem information included in the report
Figures
Figure 1. Sample FMEA Worksheet
Figure 2. Sample Criticality Analysis Worksheet
Schema v3.0Community-maintained · Verify against ASSIST 