Sustained Service Life Support


AOC's Lifecycle engineering support spans across the entire service life of major systems and facilities. We have extensive experience in maintenance, modernization, and logistics support of complex defense, and commercial systems. This work includes support to NAVSEA PMS 377 in the areas of ship logistics overhaul for the LPD 1 Ship Class, Total Ownership Cost studies for AN/KSQ-1 Command & Control System, and development and installation for the Enhanced Position Location & Reporting System. In addition, we provided Business Process Reengineering (BPR) and Return on Investment (ROI) analysis to Newport News Shipbuilding for aircraft carriers, and developed the Systems Integration Plan for PMS 317's LPD 17 Life-Cycle Manager. Our engineers have participated in the development and review of ship alterations for the Fleet Modernization Program at NAVSEA, and are planning for continuation of LCS interface lifecycle management via the Navy's SHIPMAIN process.


As part of our work in lifecycle engineering, AOC has been on the cutting-edge of Condition Based Maintenance since its founding, specializing in Failure Modes, Effects, and Criticality Analysis (FMECA); Performance Criteria Development; and Material Condition Assessment Plans (MAPs). Development of advanced sensor systems that provide data for diagnostic and prognostic models and application of analytical techniques have been key capabilities which formed the basis for contracts with both the Navy and Commercial Electric Utilities. Some examples of our engineering efforts include:


Failure Modes, Effects, and Criticality Analysis

AOC has performed FMECA analysis on systems and equipment to determine dominant failure modes and which CBM technologies can be applied to monitor those failure modes. FMECA's are based on historical failure data when available (such as 3M data, CASREPT's, or other maintenance documentation), Nonelectronic Parts Reliability Data (NPRD-2011), discussions with people knowledgeable on the system (operators, maintainers, in-service engineers, etc.), and the equipment design.


Performance Criteria Development

AOC has developed the criteria for analyzing the results of all the CBM technology monitoring identified by the FMECA. Performance criteria are generally defined for three different conditions (normal, alert, and danger).


Material Condition Assessment Plans (MAP)

AOC has developed plans for the overall material condition assessment of individual systems. These (MAPs) describe how the various technologies are used on a particular system or component to completely analyze material conditions. The MAP represents a diagnostic and prognostic analysis of the data gathered and compared against the Performance Criteria. The MAP may use techniques such as neural networks, fuzzy logic, feature extraction and data fusion to generate a complete analysis.