Caterpillar has made a minority investment, for an undisclosed sum, in Chicago-based technology company Uptake. The aim is to reduce machine downtime and maintenance costs for customers. Uptake, established by Groupon co-founder Brad Keywell, has built an analytics platform that will examine data captured from Caterpillar machinery around the world. The two companies will use this data for predictive diagnostics, to catch potential problems before they occur and to plan maintenance.