"extensive restructuring" is a correct and usable phrase in written English.
It can be used to describe a significant reorganization or adjustment of something, typically a company or organization. For example, "The company is undergoing extensive restructuring in order to remain competitive in the market."
Last year, it emerged after an extensive restructuring.
Such development has usually meant a partial or extensive restructuring of the area's economic base.
Amid investor impatience with its performance, Coca-Cola has gone through extensive restructuring in the last year.
Mr. Welch, over two decades, instituted steep layoffs and an extensive restructuring that turned G.E. into a powerhouse.
New Zealand required much more extensive restructuring in 1984 than did other developed economies, such as Britain's in 1979.
The official said the bank would have to go through an extensive restructuring before it could apply for regulatory permission to go public.
In Malaysia, the market gained 5.0% on speculation that creditors will approve extensive debt restructuring.
By contrast, South Korea recovered rapidly from the Asian financial crisis thanks to a far-reaching and extensive bank restructuring forced on it by the International Monetary Fund.
Having struggled to solve fundamental story problems, original director Bob Peterson was removed and extensive rewriting, restructuring and rerecording ensued, with most of the original cast (including John Lithgow and Bill Hader) being replaced.
Spermatogenesis that occurs in the seminiferous epithelium of adult mammalian testes is associated with extensive junction restructuring at the Sertoli Sertoli cell, Sertoli germ cell, and Sertoli basement membrane interface.
Without extensive cognitive "restructuring" of both existing and new information, the original mental structures tend to persist (e.g., see several chapters in Driscoll 2005).
