Data Processing Center

is the group of people (users and management) and information technologies (computers and digital resources) on which the IT services are based.

• DPC users need to execute electronic transactions to access data. The mainframe executes the transactions and, if data is not online, asks the robots to mount the tapes on which the requested data resides
• The mainframe has to achieve two main goals: 1) it must ensure that users response time is that which is set by DPC management and, at same time, 2) it must achieve the maximum throughput level without increasing the response time
• To achieve these goals, if resources are under-utilised the mainframe increases the number of users (multiprogramming level); and it reduces the number of users, if resources are over-utilised