The phrase "a very lengthy process" is correct and usable in written English.
You can use it to describe a process that takes a significant amount of time to complete, often implying that it is tedious or complicated.
Example: "The approval of the project took a very lengthy process, involving multiple reviews and revisions."
Alternatives: "an extremely long process" or "a protracted process".
"It's a very lengthy process and it's a very thorough process, I would say".
Health-care reform is coming, but it is going to be a very lengthy process.
"It was a very lengthy process to get the role," Bomer said.
Setting up new contracts with new providers while extricating schools from their current contractual arrangements with Jarvis and any receivers called in could be a very lengthy process".
However, Schumacher's manager Sabine Kehm, who has acted as a spokesperson for Schumacher and his family throughout the ordeal, has confirmed that the situation remains "unchanged" and has stressed the importance for patience with what can be a very lengthy process.
Barbara Gallani, director of food safety and science at the Food and Drink Federation, which represents the industry, said: "To introduce regulation would be a very lengthy process and could negatively impact the excellent voluntary work that is underway to change recipes".
A shortage of funds; The very lengthy process for allocation of loans; The high cost of imported technology (i.e. machinery and tools, know-how and R&D facilities); The low profitability of industrial SMEs in Iran, which restrains investment in technology modernization; Lack of knowledge of entrepreneurs regarding the importance of technology.
Because we both work in respite care and had previously been cleared to be foster parents, it sped up the very lengthy process.
But the end result of this very lengthy process has been to squash the competition and make life harder for smaller rivals that could have been more innovative.
The decision to limit the cross-sectional sample to 1 year was made on pragmatic grounds owing to the very lengthy process of scoring the RCTs against the checklist items.
Stratulis explains once a recommendation is made, you then have to go through a very lengthy legal process.
