UCDS President and CEO Ian Nimmo explains what High Performance HMI is and why it’s important. It’s about the operator’s ability to be performant in resolving abnormal situations. Nimmo explores the four different levels that must be set for the hierarchy of an HMI system. Your attention should be focused on the ability for an operator to detect a problem. What isn’t normal versus an emergency needs to be defined long before you get into an alarm state. If the HMI isn’t working efficiently, your operator will be overwhelmed and unable to respond appropriately.