According to Nathan Bailey, Operations Manager of specialist engines manufacturer, UEL, realizing that anything less than 100% availability runs the risk of costing lives is a great way of focusing your attention on what needs to be done. Dedicated to the design, development and production of a range of high quality, lightweight Wankel-type rotary engines for the propulsion of small and medium sized unmanned air vehicles (UAVs), UEL's chief customers are the specialist plane-makers of most of the western nations, whose own customers are the fighting forces. It was almost by chance that the company stumbled across Slim4, Dutch-owned Slimstock's forecasting and inventory management tool. The benefits of Slim4 are simple yet effective. The biggest single result for UEL has been the critical ability to identity problems in advance: in place of untracked numbers of one-off purchase orders, UEL now has a planned purchasing strategy spread over 12 months.