The phrase "already proceeded" is correct and usable in written English.
You can use it when describing something that has been previously done or taken place. For example: "We had already proceeded with the project before the new regulations were implemented."
Although this product has already proceeded to the stage of industrial production, the variety in techniques employed by different manufacturers make the final products by far not identical.
In his essay "Historic" in Fabian Essays in Socialism (1889), Webb insisted that unconscious socialism had already proceeded through public control of services, largely by the municipalities.
To reveal why he wanted to kill guy X, would inflame a case that has already proceeded out of all proportion to its seriousness – just take my word for it that it's a situation in which any of us might use this phrase hyperbolically.
My Twitter followers have already proceeded to mock me for doing so.
The growth curves were varied for each media and lag phase, for each sample, was not observed likely due to the time gaps between two measurements in which the lag phase has already proceeded.
I had already proceeded to the advanced stage of the recruitment process, but this particular interviewer seemed less interested in my technical competencies and professional background than he was in my future – and I don't mean my long-term career plans.
Commercial drone trials are already proceeding in Canada.
Injustice and irrationality already proceed from this inept piece of social engineering.
The policy was already proceeding, though slowly, when a sudden acceleration caused by a spate of carjackings in November forced the pace.
And the changes in the Future Combat program, which was expected to cost $160 billion, illustrate how the administration is already proceeding to reshape military spending.
But most UK adoptions already proceed without the consent of the child's birth parents and twice-yearly letterbox contact is the norm.
