A food manufacturer in Baltimore, Maryland, wanted to install an automated system for checking their processed food for low-density polyethylene (LDPE) and other harmless but undesirable contaminants before it was sent to storage tanks (from which it would be piped into jars and tubs). Uncertainty about the capacity and accuracy of the system led them to suggest renting some equipment and constructing a prototype system to evaluate its performance (capacity and accuracy). How does installing the system prevent a potential problem? How does the prototype prevent a potential problem?