One of the great revolutions in manufacturing of the past decades is just-in-time inventory management. The basic idea is to provision only what is needed for a certain level of operation and to put in place a number of management functions that will trigger the provisioning of inventory. This is one the key elements that allowed the manufacturing of goods to contain production costs. We have been trying to adapt the concept to IT for years with little success. But a combination of the latest technologies is finally bringing the concept to a working level. IT operations often faces unpredictable workloads or large variations of workloads during peak periods. Typically, the solution is to over-provision infrastructure capacity and use a number of potential corrective measures: load balancing, traffic shaping, fast reconfiguration and provisioning of servers, etc.