Providing a comfortable environment in a modern office is, for most clients and occupants, a given. 

But, thermal comfort is a subjective measure of how comfortable a person feels. Each individual has their preferred thermal comfort zone, which depends on the activity they are doing and what they are wearing.

I think; As a Services Engineer, this is one of the most challenging things to achieve. The article demonstrates why it is not possible to get it right all of the time for all occupants, however, there are ways of giving occupants choice and so reduce the impact of the issue.