Scientific articles/work about Power-usage / Power-user models?

Hi,

I'm writing a Master's Thesis concerning different kinds of power-user / super-user models and their adaptability in construction sector.

I've heard that there are perhaps some studies made about SAP and power usage, but I haven't have luck so far finding them. Could you help me by referring me to some scientific articles / scientific work about concerning power usage and power usage models (SAP + general)? By model I mean here the roles, responsibilities and interactions with each other people working with the software/system have.

Thank you!