DI-SESS-81497B
Reliability and Maintainability Predictions Report
Documents contractor quantitative predictions of reliability, maintainability, and Built-In-Test (BIT) to support feasibility evaluations, logistics planning, life cycle cost studies, and readiness assessments.
Approval DateOctober 8, 2019
AMSC NumberN10110
Preparing ActivityAS
Project NumberSESS-2019-061
OPR—
DTIC ApplicableYes
GIDEP ApplicableYes
LimitationNo
Applicable Forms—
Approval Limitation—
Form Version—
DID Formatfree_text
963C CompliantYes
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.
Supersedes
DI-RELI-81497A
Related
—Description & Purpose
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Application & Interrelationship
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Use & Relationship
The Reliability and Maintainability (R&M) Predictions Report documents contractor quantitative predictions of reliability, maintainability, and Built-In-Test (BIT). The report is intended as support for feasibility evaluations, comparison of alternative configurations, identification of potential problems, logistics support planning, life cycle cost studies, determination of data deficiencies, tradeoff decisions, allocation (apportionment) of performance requirements, and criteria for growth testing and demonstration. The R&M predictions report will assist in eliminating or managing high-risk elements, improving readiness, reducing life cycle cost, and assessing whether the design is capable of meeting specification requirements.
This Data Item Description (DID) contains the format, content, and intended use information for the data deliverable resulting from the work task described in the contract.
This DID supersedes DI-RELI-81497A.
Preparation Instructions
1Reference DocumentsNone.
2FormatThe Reliability and Maintainability (R&M) Predictions Report shall be in contractor's format.
3ContentThe report shall include:
3.1System configuration identification
3.2Assumptions used in the prediction process
3.3Documentation or cross-reference to the data used in performing R&M predictionsincluding the following:
3.3.1Hardware parts descriptionincluding manufacturer part number and manufacturer CAGE if applicable.
3.3.2Software Configuration Items description
3.3.3Failure rate data source and assumed operational loads
3.3.4Failure distributions
3.3.5Constraints
3.3.6Item definitionincluding assembly indenture.
3.3.7Service use profile
3.3.8R&M block diagrams and mathematical models
3.3.9Failure Modes, Effects, and Criticality Analysis (FMECA)
3.3.10Environmental dataincluding life cycle loads (e.g. engineering mechanical, electrical, and thermal analysis).
3.3.11Environmental and operating Stress dataincluding physics of failure analyses.
3.4Description of system BIT, maintenance and support concepts
3.5Description of data developed to support system age-reliability relationshipsDescription of data developed to support system age-reliability relationships (particularly for the identification of life limits) for Reliability-Centered Maintenance (RCM) analysis to develop appropriate life limits or maintenance tasks.
3.6Description of the R&M prediction procedures usedincluding methodology, models and tools.
3.7Results of the analysis performed for field reliabilityResults of the analysis performed for field reliability (mission and logistics), maintainability and BIT performance of similar and analogous items operating in the same expected environment.
3.8Applicable failure rates, failure distributions, failure rate adjustment factorsApplicable failure rates, failure distributions, failure rate adjustment factors, and reliability variables used in the calculation of each configuration item.
3.9The source(s) of the data and the evaluated validityThe source(s) of the data and the evaluated validity of data used in the reliability predictions.
3.10The operating and environmental stress factors and ratiosThe operating and environmental stress factors and ratios, along with other factors used in determining part failure rates shall be specified in the report and shall be individually identified as estimated (i.e. documented subject matter expert (SME) engineering opinion), calculated (i.e. reliability analysis from comparable systems), and measured (i.e. historical reliability from predecessor systems and shall include test and field data).
3.11How the accumulated operating hours were determinedHow the accumulated operating hours were determined when using field experience data for similar items in a like environment.
3.12The reliability prediction for each subdivision of the system breakdown structureThe reliability prediction for each subdivision of the system breakdown structure for each mission, mode of operation, and periods of non-operation and storage from an item's final factory acceptance through its terminal expenditure including removal from inventory.
3.13Maintainability predictions shall be identified for each associated level of maintenanceincluding both unscheduled and scheduled maintenance, and shall also include repair time source data for the prescribed level of maintenance.
3.14BIT predictions of the overall system level BIT fault detection and fault isolation
3.15Risk assessment and mitigation plans for each configuration item's reliabilityRisk assessment and mitigation plans for each configuration item's reliability, maintainability, and BIT value based upon the data source and maturity of design.
3.16Conclusions and recommendations based upon the R&M predictionsConclusions and recommendations based upon the R&M predictions that coincide with the phase of item development and shall specify any indication of the system's reliability and maintainability status. All R&M deficiencies identified shall be included and shall also contain the course of action to be taken to resolve each deficiency.
References
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