The phrase "a laborious process that" is correct and usable in written English.
It can be used to describe a task or procedure that requires a significant amount of effort and time to complete.
Example: "The project involved a laborious process that required meticulous planning and execution to ensure success."
Alternatives: "a tedious process that" or "an arduous process that".
Updating them is a laborious process that can take upto two years.
And their crafting — a laborious process that involves stacking, gluing and cutting planks of cedar — is labor-intensive.
However, current methods for measuring structural complexity require a laborious process that involves many logistically expensive point based measurements.
It is also applying for licences allowing customers to play in the shelters, but this is a laborious process that will take at least 12 months.
Until the mid-eighties, the two of them hand-set text on an old letterpress, a laborious process that encourages caution and thrift.
A century ago, confectioners made marshmallows from a froth of sugar, starch and gelatin, in a laborious process that involved lots of primping.
The Highways Agency, which runs and maintains the most important roads, is also being turned into a GovCo, albeit through a more laborious process that requires legislation.
But equally GM is not a magic bullet – it is a slow, laborious process that fails as often as it works.
People all over the world were sequencing individual genes, but it was a hugely laborious process that could take three months for a single gene, even if you knew where to start looking.
Manual curation of papers or patents to generate annotations and populate chemical knowledgebases is a very laborious process that can be greatly improved through the use of automated language processing pipelines.
"It was a very laborious process that took over two months to complete from beginning to end… but was completely worth it".
