From OpenSCADAWiki
At the same time, firms that are engaged in the implementation of ACS TP, are interested in the full control of the SCADA system, which they implement on the customer's objects. The Customer is the last link into the chain of the program creation. The quality of Customer's interaction with the developer directly proportional to the customer's satisfaction, as well as the speed of the program improving. Due to the foregoing, the image of the firm, which implements the control system of the TP, is dependent proportionally. Adaption of completed commercial SCADA system usually leads to deterioration or complete lack of interaction between the Customer and the developer.