We have almost everything that has been said. Also something i see alot in the japanesse factories i have worked in is that they love to build cages around the entire mach except were the operator works. we use alot of door saftey switchs and limits. In my 10yrs of maint experience i would say one of the biggest reasons people by pass its the time factor they get tired of waitting. This problem usually could be solved if the engineer who decided to put the saftey componet in would listen to the maint guy and the operator a little more often. As for the pull cords we have them on our paint line and assembly lines
