Understanding Mission Time: Why It Matters for System Reliability 

We understand that reliability is critical to every automation and control application. One key factor that often determines long-term performance is mission time, the manufacturer-recommended operational lifespan of a component before it should be replaced or refurbished. 

As equipment ages, the likelihood of component failure increases, especially when mission times are exceeded. Outdated systems can introduce significant operational risks, from reduced efficiency to unexpected downtime. 

That’s why FAIRFIELDS’s engineers work closely with clients to assess the condition and lifecycle of their control systems. By identifying components that have reached or surpassed their mission time, we help organisations plan proactive upgrades and replacements that maintain safety, compliance, and reliability. 

From bridges and water infrastructure to manufacturing, FAIRFIELDS ensures that every project operates within safe mission parameters, keeping critical assets running smoothly and efficiently for years to come. 

Dan Rosen, Senior Function Safety Engineer, added:

“It is vital that the mission time is observed, particularly in safety systems.  Once a safety component operates beyond the manufacturer’s stated mission time, its reliability data becomes invalid. This means any Performance Level or Safety Integrity Level assessment that includes this component can no longer be trusted. As a result, the safety system may not provide a predictable level of risk reduction, and the component must be replaced.”