The phrase "a strategy that has effectively" is correct and usable in written English.
You can use it when discussing a specific approach or plan that has proven to work well in achieving a desired outcome.
Example: "The company implemented a strategy that has effectively increased its market share over the past year."
Alternatives: "a method that has successfully" or "an approach that has efficiently".
On the other hand, signing letters of invitation to join the program, a strategy that has effectively improved participation [ 29], was mentioned by less than half of all professionals, perhaps because Spanish physicians and nurses, and especially the former, dislike administrative tasks.
Mr. Huckabee, running a shoestring campaign, has relied largely on personal appearances and interviews in the news media to get his message out, a strategy that has raised questions about how effectively he could counter Mr. Romney's paid attacks.
The authors of that study have identified three proven strategies that have effectively reduced all-cause readmissions through six of twelve months.
Equally, marketing could be used more effectively to promote healthier foods, a strategy that has delivered some success through supermarkets and other points-of-purchase [ 144].
It's a strategy that has worked.
[ 37] A supervisory strategy that has been effectively used in some CHW programmes, such as Bangladesh Rural Advancement Committee BRACC)'s Shasthya Shebikas in Bangladesh is to assign CHWs with a higher level of training (Shasthya Kormis) to supervise the CHWs [ 38].
The restructuring team must be committed to finding and implementing innovative strategies that have the potential to effectively produce educational change.
A therapeutic strategy that applies high doses of L intermittently has been shown to more effectively inhibit tumor growth in mouse models with minimal toxicity [ 46], a strategy that might be considered in the clinical setting.
A key part of the government's economic strategy had been to boost domestic demand by Keynesian-style spending, the political failure to have a functioning government has effectively undermined that whole strategy.
It is a strategy that we cannot carry out effectively, and there is no reason to adopt it anyway.
He isn't surprised by recent reports that the U.S. has effectively abandoned what was once the cornerstone of American military strategy in Afghanistan — brokering a peace deal with the Taliban.
