The value of real-time decision-making in an oil & gas production process or at a petrochemical plant is closely related to situational awareness. In this setting, real-time is defined as time-critical decisions within seconds based on live real-time data. The control room operator normally operates in a time frame of seconds to minutes, but not all decisions are equally time critical. The reason we specify our understanding of real-time is to make a distinction to real-time that is also used for systems working on real-time data, but offline non-time critical. These kinds of applications are often used more as back-office support for operation and maintenance.