This article is an additional response to an excellent article written by Simon Powers here, where Simon discusses putting Architecture back onto the Agile roadmap.
Most functionality needs architecture to work. An obvious example to illustrate this fact are buildings. There was a famous case with London’s Millennium Bridge, which gained the nickname ‘Wobble Bridge’ because it was... a bit too wobbly. The problem was fixed with dampers, similar to shock absorbers on cars, without a rebuild or redesign of the bridge being necessary.
Since then, another problem has come to light with the Walkie Talkie building. Reflected sunlight coming from the building was damaging cars, and the problem was fixed with some simple solar shading.