H+N+S started the office with Plan Ooievaar. Prior to the founding of the office, the founders already made a name for themselves with this spatial plan that won the first Eo Wijers competition in 1985. Plan Ooievaar is based on the hull approach, in which a dichotomy is used: framework and implementation. The framework provides space for slow, natural processes such as sedimentation and erosion within the river system. And to fast processes, such as agriculture, within that framework. This landscape system thinking is also the identity and basis of H+N+S and has been further developed over the past 30 years.