Thinking that a single pilot *doesn't* need CRM is silly - single pilots are the ones taking off in overweight beavers and helicopters and flying into mountains in bad weather. They are the ones with no feedback from their peers as to whether what customers or management are wanting is normal or not (see my last article in Vertical on that one).
Actually, my acronym stands for *Company* resource management, and I encourage them all to join in. At our place, we pretty much know what each other's problems are, engineers and observers included, and there sure ain't no friction. The job gets done smoothly and efficiently with no BS and we all go home safe and sound. If it comes to that, observers are the most important members of our team
Phil