Siemens utilizes an unfortunately complicated system for building reusable order sets in their pharmacy system. UnlikeÂ Meditech where you can use formulary medications, enter them the way they appear on the order set, give the newly created order set a name and save it; Siemens Pharmacy requires that you first construct a series of “Predefined Common Orders” (PCOs) and use those as building blocks for each order set. PCOs are not only used as building blocks for order sets, but can be used to create shortcuts for medication order entry as well. Each PCO must have a unique name and be specific to the order set from which is hails. Reusing PCOs in multiple order sets creates maintenance issues when one order set makes a revision and the other does not.