In this computer age, the term "user friendly" has been coined with a particular set of connotations, including streamlined program access and a forgiving, helpful computer environment. "User friendliness" is critical to an EMCS's efficient, optimized application. The energy engineer should be aware of the long term, consequential impact the EMCS will have upon the facility and aware that the representation displayed on the computer screen will be THE EMCS for all personnel. Therefore, this Person-Machine Interface (PMI)is the most critical element of the day-to-day long-term use of the EMCS. The energy engineer needs to carefully consider the presentation, features, and "user friendliness" of the PMI software.
