Abstract : Energy and process optimization studies were conducted at selected Army Arsenals and Depots (Rock Island Arsenals; Corpus Christi, Tobyhanna, and Sierra Army Depots) to compare/benchmark energy use among these facilities and against private sector manufacturing facilities; and to identify energy conservation, process, and environmental opportunities that can improve the installations competitive positions. The results were evaluated to determine which processes were efficient, and those that could improve. Four processes were identified as suitable for benchmarking: metal casting, metal finishing, painting, and heat treat. The metal casting operation at Rock Island Arsenal was found to be one of the most efficient of the 59 foundries surveyed. The remaining three Arsenal and Depot operations were found comparable with and in some areas more advanced than their private industry counterparts. By analyzing strengths and weakness, these benchmarks help installations to achieve greater energy efficiency by continuous process improvement. The report covers basic energy consuming systems at most facilities and details energy saving measures that can reduce energy use and increase operational performance. This work can be used by energy and production managers at other DOD installations to optimize production processes performance and reduce their energy use.