You bring up an important point krp76. Both the instructions and training play a pivotal role in ensuring that Human Factor aspect is well considered. Taking into consideration all aspects at play is important in addressing any issues of miscommunication. Well written instructions as mentioned are a great start, but proper labeling also plays a roll. Additionally, these must often be clarified to the point of being poka-yoke or idiot proof. This is the only true way to implement effective human factor practices.

-Romany Botros