Planning fallacy
The Sydney Opera House was expected to be completed in 1963. A scaled-down version opened in 1973, a decade later. The original cost was estimated at $7 million, but its delayed completion led to a cost of $102 million.
Ove Arup
Arup was the design engineer for the Sydney Opera House in Sydney, Australia from the project's start in 1957 to its completion in 1973. An iconic building making groundbreaking use of precast concrete, structural glue and computer analysis, this made Arup's reputation, and that of his firm, despite the extremely difficult working relationship with the architect, Jørn Utzon.