One tenth of the world's economy goes towards building, dealing housing and commercial property. This sector accounts for more wood, minerals, water and electricity than the remaining 90% of the economy. Therefore new tactics in all life stages of buildings are needed, which will meet the tasks of satisfying the growing human needs while conserving and protecting the environmental quality and natural resources. Designing for sustainable development not only encompasses using recyclable building materials and reducing energy consumption while building, but it also implies better use of available building materials, production systems with less environmental burden, products with higher performances, design systems in line with new hassles for flexibility and adaptability to future needs, energy conservation at construction and during use of the building, environmentally friendly demounting and recycling instead of noisy and dusty demolition. The real challenge for the precast industry is to improve production processes that enable the combination of mass production and flexibility. To achieve this, hollow core slabs are setting the tone.