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Purpose: The conventional predicted MFTBF by military standard has a wide discrepancy to that of real-world operation, which leads to overstock and increase operation cost. This paper introduces a analyzing frame using operational reliability and cost data to overcome the discrepancy, and provides reliability improvement process employing the analyzing frame. Methods: This paper suggests Reliability-Cost Matrix (R-C Matrix) and Operational Reliability & Cost Index (ORCI) as a tool for reliability evaluation. Results: KOREIP(KAI’s Operational Reliability Evaluation and Improvement Process) is develo ped employing Reliability-Cost Matrix and Operational Reliability & Cost Index.Conclusion: KOREIP provides a process and its activities based on Reliability-Cost Matrix frame. The process and activities leads reliability improvement of aerospace electronic equipments by means of categorizing and follow-up action based on the concept of frame.Key Words: Operational Reliability, Reliability Improvement Process, Reliability-Cost Matrix, Aerospace Electronic Equipments

A Study on Reliability Evaluation and Improvement Process of Aerospace Electronic Equipments using Operational Reliability-Cost Matrix