Depending on your requirements the concept of system redundancy and resiliency might never cross your mind. For many facilities, however, having a system that minimizes outages and hiccups to an absolute minimum is a must.
When you talk about redundancy you really should look at two different aspects; redundancy and resiliency. What’s the difference between the two? For me redundancy is having functions duplicated across multiple components so that if a single component fails the system continues in operation without anyone even noticing. Resiliency is the ability of a system to easily recover from a failure.