The phrase "an operation from which" is correct and usable in written English.
It can be used when describing a process or action that results in a specific outcome or effect.
Example: "The study focused on an operation from which we could derive significant insights into consumer behavior."
Alternatives: "a process that leads to" or "an action resulting in".
Two weeks later he found himself having an operation from which he never regained his sight.
Mixing bloodshed, secrecy and sinister new weapons, this was an operation from which the first, decent instinct is to recoil.
It is an operation from which we have learned a huge amount and that is why we have been able to keep this country in the main extremely safe over the subsequent years".
When she was going to the hospital for an operation from which she knew she might not recover she took along Wordsworth's Longer Poems and a blankbook for practicing her French verbs.
One had a handicapped parking tag because of a recent operation, from which he had fully recovered.
Only in Italy was there a significant joint venture, Wind, a mobile phone operation, from which, Bon says, Deutsche Telekom will now withdraw.
It is understood that if American Media fails to secure a new licence arrangement with another British publisher, it may keep Shape going by expanding its own Harrogate-based UK operation, from which it publishes a number of body building titles.
The Austrian operation from which he joins has a more traditional Lidl culture and is seen as a training camp for executives.
The first, which they're calling an "environmental warranty", allows cell phone owners to drop off any old handsets or accessories at any of 500 collection points already in operation, from which they will be recycled in an eco-friendly manner.
But there were also areas of this operation from which the police can learn and it is important that these points are not only acknowledged, but also acted upon".
