The phrase "as a key milestone" is grammatically correct and can be used in written English.
It is often used to indicate that a particular event or moment is significant in achieving a goal or completing a project. Example: "The completion of this project marks a key milestone in our company's growth and expansion."
Richard Garnett, the task force's chair, described the Efsa ruling as "a key milestone" in the assessment process.
It continues to be recognised as a key milestone in Hawkey's significant influence on the visual culture of Britain in the second half of the 20th century".
Just last month, it was confirmed that Waterloo Road producer Shed Media would make Jerry Seinfeld's forthcoming new show for NBC, The Marriage Ref. However, the snapping up of Merlin is being seen as a key milestone.
Danny Alexander, the chief secretary to the Treasury, who is overseeing the project, described the first tunnel's completion as "a key milestone in the journey towards a better transport network in London".
That was the famous letter which pledged to support the establishment of a "national home" for the Jewish people in Palestine and is seen as a key milestone for the Zionist movement.
Officials on both sides of the labor divide have pointed toward Labor Day as a key milestone, because training camps are scheduled to open the week of Oct. 2. Next week's bargaining session may be the first critical moment of the two-month standoff.
"This is a key milestone as we build the new Enron and work to establish a platform for restructuring the company and emerging from Chapter 11 bankruptcy protection," Kenneth L. Lay, Enron's chairman and chief executive, said in a statement.
In the first address to the British parliament by an Irish president, Higgins hailed the 1998 Good Friday Agreement in Northern Ireland as a "momentous" achievement that was a key milestone on the "road to today's warm, deep and enduring Irish-British friendship".
They know their business success depends in large part on keeping a stable and productive team on the job for the long haul — or at least long enough to make it through a key milestone such as a product launch, a critical round of funding or an exit event.
Todd May, the current director of Marshall Space Flight Center and former SLS program manager, said that despite these challenges, SLS managed to complete a key milestone known as the critical design review in the same amount of time it typically takes a NASA science mission to reach the same milestone.
Safeguards built into the bitcoin software are about to be triggered as the number of bitcoins in circulation hits a key milestone.
