4.1 flexible.

1. Capable of bending easily without breaking. 2. Able to be easily modified to respond to altered circumstances or conditions.

“Our research shows that any process of arranging and rearranging modules is fundamentally limited, and cannot produce the kind of comfort – the deep and simple feelings – that we are seeking. Profound adaptation in which things are comfortably related to one another can only occur when the elements involved are all capable of very fine dimensional variation.”

C. Alexander, A. Anninou, G. Black and J. Rheinfrank, “Towards a Personal Workplace”, Architectural Record Interiors, Vol. Mid-September (1987), pp. 131-141.