In 1946, Florence Knoll began the Planning Unit, an interior planning arm of what was then called H.G. Knoll Associates.
Although it never exceeded a handful of designers, the Planning Unit team worked on projects for some of the biggest corporations in America.
Lewis Butler, one of the first members of the Planning Unit, recalled of Hans Knoll: "He felt, by combining the professional and manufacturing facilities, he could develop a group that could teach the profession what constituted good furniture on contract deals."
Of Shu, he noted: "She was a driving force, extremely creative. She could target in on one thing, whether it be fabric, catalogues, or furniture development. She had a strong, basic design philosophy."
1950–57: Connecticut General
At the recommendation of Gordon Bunshaft, a partner at Skidmore, Owings & Merrill, the Planning Unit designed the interiors of the new Connecticut General Life Insurance Company headquarters in Bloomfield, Connecticut.
For Florence Knoll, the project represented a prime opportunity to showcase the fundamental design principles and abilities of the Planning Unit.
"Shu Knoll had developed quite an interior department and she was hired to do the interiors at our recommendation—to do the interiors for Connecticut General," recalled architect Gordon Bunshaft in an interview for Knoll Design.
"It was a very happy joint venture. Our design interests were more or less the same—international modern."
The experience proved to be a positive one, in part due to the keen involvement of Frazar B. Wilde, the president of the insurance company. In a letter to Wilde years later, Florence Knoll wrote: "I know from the personal experience of the two years I enjoyed working for you on the first Connecticut General buildings in Bloomfield, Connecticut."
The lengthy design process tested out the various cubicle dimensions, lighting schemes and types of building material being considered for the final headquarters, notably through the use of a full-scale mock-up that was built on the site of the new building. SOM and the Planning Unit used the mock-up, which represented 1% of the total office space, to simulate the office environment with as much accuracy as possible.
In Knoll Design, Eric Larrabee writes, "It was a turning point for Knoll and for commercial American interior design. Connecticut General was Shu Knoll’s opportunity to demonstrate on a large scale what she had previously been practicing in the small, the analysis of design needs in terms of actual office behavior, and the reorganization of the spatial environment to accord with the reality."
1962: Cowles Publications
One of the most celebrated projects designed by the Knoll Planning Unit was completed in 1962, for the New York office of media company Cowles Publications.
The total number of drawings for the Cowles Publications offices amounted to a whopping 197. In a review of the project, Progressive Architecture wrote, “the number of drawings executed for the project is another indication of KPU’s precision. Beside the usual plans—construction, electrical, plumbing, heating-ventilation-air conditioning, and finishing and furniture plans—and several preliminary sketches, KPU also executed plans and schedules for floor coverings, draperies and blinds, plants, pictures, and accessories.”
The project was perhaps the apotheosis of the Planning Unit's talent for bespoke design based on extensive research and survey. An example of this can be seen in the custom-built credenza in the president's office suite, a modified version of the executive credenza that Florence Knoll developed upon identifying a gap in product offerings for executive offices.
“The cabinet behind the president’s desk contains dictating equipment, storage space, an oversized wastebasket for bulky newspapers handled each day, and two control panels,” Progressive Architecture described. “One of the panels is a narrow call director, which was specially developed by KPU in co-operation with telephone engineers.”
The panel also contained electrical controls that allowed the director to open and close the vertical blinds and draperies, adjust the angle of the blinds, control the recessed ceiling lights as well as the outdoor lights, and remotely lock and unlock the office door.
“The offices also possess an unostentatious elegance, which has been achieved in part by an adept orchestration of textures,” Progressive Architecture noted. “A balance between fabrics and polished surfaces makes the room warm without being woolly, and bright without a suggestion of brittleness.”
They concluded, “It is this meticulous attention to every detail of interior design for which the Knoll Planning Unit is renowned.”
The project caught the attention of Frank Stanton, president of Columbia Broadcasting System. A few years later, he would work closely with the Planning Unit on the interior design of the new CBS Building on Sixth Avenue, a towering black granite skyscraper designed by Eero Saarinen.
In a note to Shu, he wrote,