The phrase "a plan which has" is correct and usable in written English.
You can use it when describing a specific plan that possesses certain characteristics or elements.
Example: "We need to implement a plan which has clear objectives and measurable outcomes."
Alternatives: "a plan that includes" or "a plan possessing".
Before action, however, there should be a plan, which has been demonstrably missing in recent weeks.
All of the candidates criticized a plan, which has angered public housing residents, to raise money for the New York City Housing Authority by constructing luxury apartment buildings on housing authority parking lots and playgrounds.
Hester, who has overseen a plan which has led to more than £900bn of assets being sold or run off in an effort to reduce the risks the bank is running since he took over from Fred Goodwin, also needs to sell 316 branches under the terms set out by European state aid rules.
India had sought British advice over a plan to remove the militants from the temple complex, Fall writes, adding: "The foreign secretary decided to respond favourably to the Indian request and, with the prime minister's agreement, an SAD officer has visited India and drawn up a plan which has been approved by Mrs Gandhi.
The other letter, dated 23 February 1984, said "the foreign secretary decided to respond favourably to the Indian request and, with the prime minister's agreement, an SAD officer has visited India and drawn up a plan which has been approved by Mrs Gandhi.
Treasury officials have said they have no plans to enact such a plan, which has been the subject of intense rumors on Wall Street in recent weeks.
About a year ago, the Council defeated a plan, which had been supported by the mayor, to redevelop the Kingsbridge Armory in the Bronx into a major commercial complex.
The Labour leader also went on to accuse David Cameron of presenting a plan which had been "chaotically conducted" and "hastily prepared".
I had a plan, which had taken shape when I was emailing the Keeper of the Handle (as I had mentally started referring to this mythical, unreachable creature).
He said a 1984 letter from the prime minister's office stated that a British adviser had "visited India and drawn up a plan" which had been approved by the Indian government.
On 5 July 1943 Model led the northern assault on Kursk during Operation Citadel, a plan which had caused great controversy within the German high command.
