Roll making technology responds to advancements in rolling practices, developments of rolled steel materials, and developments of new roll manufacturing methods. The lag time involved in development and production of new roll* qualities often means existing roll inventories become prematurely obsolete. There is a growing concern that mill roll reliability could become a limiting factor for commercial adoption of new flat and long rolled metal material grades in existing rolling mills. Engineering-based mill roll specifications and roll material standards should be formulated to address future flat roll industry requirements.