Attributes of Performance-Centered Systems: What Can We Learn from Five Years of EPSS/PCD Competition Award Winners?
http://www.ingentaconnect.com/content/stc/tc/2002/00000049/00000004/art00007
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  peer-reviewed

Marion, Craig
Technical Communication Online
2002

Abstract:

Reviews briefly the systems that Gery presented in Electronic Performance Support Systems and then focuses on the 19 attributes she subsequently developed to elucidate them. Then examines the 1997–2001 competition award winners in light of these attributes. Doing so, it turns out, both clarifies the attributes and suggests a few new ones.