'rigorous condition' is correct and usable in written English.
You can use the phrase when referring to a situation where specific criteria must be met in order to be successful. For example, "The engineering team had to meet a rigorous condition before releasing the new product."
The young plants that thrived under the rigorous conditions passed Dr. Buck's first and most critical test.
Hunt has reassessed the project and approved it for a second time, subject to "rigorous conditions" that would protect threatened species.
After the House of Lords declared their detention illegal, the men were put under house arrest with rigorous conditions, which some have broken.
The "Mythbusters" group invited Dr. Wallace and his students to California to revisit the question under more rigorous conditions for an episode that ran earlier this year.
Dr. Stephen Bloom, an obesity researcher at Hammersmith Hospital in London, said the study needed to be repeated under more rigorous conditions, but added, "It is showing something I believe in deeply — it is very hard to lose weight".
With a given reagent, diamond is generally less reactive than graphite and, thus, requires more rigorous conditions for reaction, such as a higher temperature; the ultimate products, however, are the same.
That is the question of whether Turkey, a Muslim country of nearly 70m souls, which is already part of NATO, should be invited, with real intent provided that the applicant meets rigorous conditions, to join Europe's top civilian club too.
Quetiapine was tested in the four EMBOLDEN and BOLDER studies under rigorous conditions.
However, the removal of the sulfur compounds is carried out under less rigorous conditions.
In vivo experiments are required to test the developed forceps under more rigorous conditions, which is our future work.
