Logistical reliability metric development for assessing fielded equipment performance to requirements

This paper details a process for developing a metric for field reliability performance using the value that is directly measured (i.e., maintenance actions). The derivations of the mathematical equations used to translate the cumulative mean-time-between-maintenance-actions (MTBMA) into the required number of cumulative maintenance actions are provided. The process is completed with the generation of a plan line for cumulative maintenance actions versus flight hours to status the program´s reliability performance to the requirements. The metric enhances early insight to potential program risks. With early identification of the program risks, corrective action implementation, cost savings and/or avoidance initiatives can be evaluated for the prudent decision. Since this metric can be a departure from traditional reliability status reporting, the merits of this metric must be acknowledged and accepted as the standard for program briefings at the earliest stages of the program