The phrase "as a major operation" is correct and usable in written English.
It can be used to describe an action or event that is significant in scale or importance, often in a formal or technical context.
Example: "The project was undertaken as a major operation to improve the infrastructure of the city."
Alternatives: "as a significant undertaking" or "as a substantial endeavor."
Despite the relief that Hagupit had not been as devastating as was feared, a major operation remained to clear debris and get supplies to people left homeless or without power.
In cities such as Dhaka and Chittagong that was a major operation as well as a major luxury since the journey time through streets that are usually extremely congested was slashed dramatically.
Australia joined the Grand Fleet in a sortie on 29 March, in response to intelligence that the German fleet was leaving port as the precursor to a major operation.
The squadron joined the Grand Fleet in a sortie on 29 March, in response to intelligence that the German fleet was leaving port as the precursor to a major operation.
Malcolm Griffiths, a consultant obstetrician and gynaecologist who led the development of the guidelines, said: "Caesarean section is a major operation, it's about as major as a hysterectomy.
She could not come back home as I was due for a major operation, and we could no longer safely care for her, even with the help of four care worker visits.
MEETING the parents is always awkward for couples, but for Tamar Schiffman and Jonathan Lechter it was especially uncomfortable: her parents met her future husband in a Washington hospital, as their daughter recovered from a major operation.
As Kemp struggled to regain his form in the wake of a major operation, Puig emerged as an overnight sensation.
McMahon, who totaled nearly 3,500 passing yards as a freshman and sophomore, underwent a major operation last fall to repair torn ligaments in his shoulder after diving for a touchdown against Virginia Tech in the fifth game.
