A steady drumbeat of battle-damaged helicopters, like the H-60 shown here, comes to Corpus Christi Army Depot for repairs, maintenance and upgrades. Like many MRO centers, CCAD employs lean and Six Sigma. But it also adopted a management tool that has it enter the world of WIP, buffers and the theory of constraint. David Jensen explains how CCAD tackled a growing workload in this month's cover story. Photo courtesy of Sikorsky.