The article compares two types of curtain wall facades for a Science Business Center near Delft University. The goal is to see which facade system, unitized or post-and-rail, is better. The unitized facade is pre-assembled in units, while the post-and-rail facade is put together on-site. The researchers want to find out which type is more suitable for the building. They looked at factors like cost, speed of construction, and thermal performance. The study found that the unitized facade is faster to put up and meets energy efficiency requirements better than the post-and-rail system.