Design and Implementation of a Generic BIT Processing Module for Hierarchical Equipment Diagnostics in Weapon Systems

This study proposed the design and implementation of a generic built-in test (BIT) processing module applicable to weapon systems. The module was designed to evaluate the operational status of line replaceable units (LRUs) based on a hierarchical equipment structure using bit-level diagnostic data. To decouple the status evaluation logic from hardware interface protocols, the proposed architecture employed externally manageable XLSX-based bits and LRU databases, enabling flexible updates without software recompilation. The evaluation engine adopted a recursive algorithm inspired by the composite design pattern and depth-first search (DFS), ensuring an efficient and non-redundant state propagation across multilevel LRU trees. Moreover, the module provided a scalable and maintainable foundation, contributing to the standardization and automation of health diagnostics across various weapon platforms.