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.
Civil and Civic
Civil and Civic went on to become Australia's leading provider of project management services in the construction industry, delivering a number of landmark projects including Stage I of the Sydney Opera House, Australia's first high-rise (Caltex House), and the world's first high-rise strata title apartment building (Blues Point Tower).