The phrase "a much more rigorous" is correct and usable in written English.
It can be used when comparing the level of rigor or strictness of one thing to another, indicating a higher degree of rigor.
Example: "The new study employs a much more rigorous methodology than the previous research."
Alternatives: "significantly more stringent" or "far more demanding".
Ice wedges require a much more rigorous climate to grow than does permafrost.
Ms. Queen said the state now has a much more rigorous application and audit process for certification programs.
"There will also be a much more rigorous focus on what realistic growth for a company can be," he said.
And, he said, the nominee will face pressure to manage a much more rigorous process to prove to the media that the vetting has been thorough.
"In comparison to the previous way the guidelines were done, we're taking a much more rigorous approach, a much more scientific approach, to minimize bias".
"Our vision is, by 2020, to have a much more rigorous and robust approach to tracking rights-based programmes," DeFillipo said.
Fiction makes everyone comfortable and talkative; journalism -- good, probing journalism -- is a much harder, much more rigorous task.
Despite a wealth of literature supporting both theories, a growing number of recent studies employing much more rigorous lineage tracing analysis have cast a significant degree of doubt on the notion that fibrogenic cells arise from sources outside of tissue-resident MSCs.
All this despite a bidding process that has become much more rigorous and transparent.
As a result, the "attitude approach" is much more rigorous to predict entrepreneurial intention than the demographic and personality trait approach (Krueger et al. 2000).
Variety had a particularly entertaining, if biting, take, with writer Maureen Ryan likening the show to "something that was developed at a cocktail party, and not given much more rigorous thought or attention after the pitcher of mojitos was drained".
