The typical layout and design of the workplace has evolved significantly throughout the last century. Trends emerged as early as the 1920's when offices were designed to have an open floor plan with employee desks facing supervisors, later transitioning to the cubical environment that many Americans still work in on a daily basis. Collaborative workspaces were then introduced during the late '90s and millenium years, offering more flexibility to employees in choosing how they'd like to get their work done. Increased mobility, in turn, increases motivation, which is critical for office productivity.
The below infographic provided by the University of Southern California Applied Psychology Department explains the evolving trends in office design and sheds some light on what keeps employees happy and healthy, allowing for the most productive workforce possible. It can also be viewed here.