I have 3 interfaces, interface1, interface2 and interface3. Each of these interfaces process data from MQ Series queues, Q1, Q2, Q3. The data from the sending system sends the data to the Q's at 12 midnight, at 2 am the interfaces are started and process the data in the following orders, interface1 runs and processes all data from Q1, on completion interface2 runs and processes all data from Q2 etc. The order is important. This interface I have built in SAPBC and works. I now want to build in XI, there does not seem to be an obvious way to maintain this order, any suggestions ?.