The phrase "a very cumbersome process" is correct and usable in written English.
You can use it to describe a procedure or task that is complicated, difficult, or unwieldy.
Example: "The application for the grant was a very cumbersome process, requiring numerous forms and extensive documentation."
Alternatives: "an extremely tedious process" or "a highly complicated process".
"Record keeping is a very cumbersome process," said James Griffin, spokesman for Fidelity, which has offered a similar system for individual stock transactions since November 2000.
Of course soon nobody will understand this: there'll be no one alive who wrote on a typewriter, but it was a very cumbersome process.
On the other hand, though the log-based forensic analysis can enhance the understanding of how these invasion processes break into the system and what files are affected by them, it is a very cumbersome process to manually acquire information from logs which consist of the users' normal behavior and intruders' illegal behavior together.
EVLW gravimetry, the gold standard of lung water measurement, is a very cumbersome process [ 44].
Presence of a referral coordinator at the primary hospital means that a knowledgeable staff person, not a physician but usually a clinician such as a nurse, is available to coordinate and facilitate what can otherwise be a very cumbersome process of referral and transfer.
"A very cumbersome, manual process is now very efficient, and we can do what-if scenarios for the first time," says Alan S. Davis, a Southwest vice president.
What I found was a very cumbersome and inefficient process which ultimately resulted in a 'pass,' leaving Steven without his Crown Vics.
This was a very cumbersome and time-consuming procedure requiring extensive off-line analysis.
Impeachment, however, is a very cumbersome, slow, ill-defined, inflexible, ineffective, and seldom-used procedure.
It is, to begin with, a very cumbersome process so cumbersome that Britain abandoned it two centuries ago as a means of disciplining ministers.
Pain assessment is a very cumbersome and subjective endpoint to characterize.
