The phrase "assumed significant" is correct and usable in written English.
It can be used in contexts where you are discussing something that is believed to have importance or relevance based on certain assumptions.
Example: "The results of the study were assumed significant, leading researchers to explore further implications."
Alternatives: "considered important" or "deemed significant."
Following Kodak's historic outsourcing decision, technology outsourcing has assumed significant importance among researchers and practitioners.
American Chrysler dealers, who were given the opportunity to bid for a Fiat dealership, assumed significant building and operational costs in part because they anticipated that sales of Alfa Romeos would help defray those costs.
Even in the second scenario, which assumed significant increases in the use of renewable energy like wind and solar power, the study concluded that fossil fuel emissions could push average high temperatures up by four to six degrees -- the difference, one author said, between the temperature in Yosemite National Park and downtown Sacramento.
The FBI assumed significant cybersecurity responsibilities under the Obama administration.
Many muni owners, it turns out, had assumed significant credit risk for very meager returns.
In course of time, hot strip surface quality, and in recent times, surface quality of structural products like rods/bars have assumed significant importance.
Statistical significance was evaluated by an unpaired t test assuming significant association at P < 0.05 compared with control samples.
Although pay scales are now being reviewed, the army remains embryonic and is unlikely to assume significant counterinsurgency missions for some time.
Due to drilling uncertainty, a relief well assumes significant responsibility to cope with potential accidents during onshore and offshore drilling.
Owing to its various deleterious effects, abatement of SO2 from point sources assumes significant importance over the years.
The worst case or conservative scenario assumes significant market penetration by Japanese producers via major technological advances coupled with aggressive price cutting.
