The phrase 'consequential change' is correct and usable in written English.
You can use it to describe an alteration that has a significant effect on something. For example, "The consequential change in the law had an immediate impact on how the government operated."
"This is the most important and consequential change they've experienced since they came to North America in the 18th century".
We asked as they were departing whether, with a new American President taking office, they anticipated any consequential change in Chinese-American relations.
The sudden inversion of commercial fortunes in Herat may not be the most consequential change since the Taliban left, but to those who believe even mild hedonism is part of the human condition, it is one of the more heartwarming.
Rather than an abrupt departure, same-sex marriage is the culmination of a larger and ultimately more consequential change in the nature of marital relations between men and women.
Chief executive Andi Case said: The multi-cyclical and volatile nature of our markets has once again been demonstrated by the sudden shift in oil and other commodity prices which, when coupled with the evolving economic environment, has given rise to a consequential change in the demand supply balance in many markets.
In a Critic at Large that ran in 2004, Adam Haslett discussed how the debate over same-sex marriage illuminated already-existing changes in the traditional notion of matrimony: Rather than an abrupt departure, same-sex marriage is the culmination of a larger and ultimately more consequential change in the nature of marital relations between men and women.
It now seems more likely that, rather than being plunged back into a medieval deep-freeze, consequential changes in the Gulf Stream will merely slow the warming of Europe.
Just a year old, Craftsteak has undergone so many targeted and consequential changes that I feel compelled to update my initial review, which awarded it one star.
As governor, Mr. Chafee chaired the board of the Economic Development Corporation he had accused of negligence, but until 38 Studios went under, he made no consequential changes to the board or its staff.
Between 2000 and 2006, there were 18 states with consequential changes in the minimum wage11.
A number of other consequential changes occurred as a result of the war, which were also socio-political in nature (Bhatnagar and Singh 2011).
