"half-hearted approach" is correct and usable in written English.
You can use it when referring to something that is done without enthusiasm or commitment, such as an attempt at something. For example: "He took a half-hearted approach to the project, and the results were not as successful as they could have been."
Still, he assured committee members that the delays in providing a fuller picture did not mean a half-hearted approach.
The half-hearted approach is reflected in other oddities such as the government diktat that speed cameras must be painted bright yellow, and accompanied by conspicuous road markings.
That is why a clear statutory provision needs to be made, not the half-baked, half-hearted approach that the draft measure currently contains.
Certainly, there is little prospect of the half-hearted approach being pursued by the United States, Britain, and France achieving such an end.
As an emblem for humanity's half-hearted approach to saving the planet – without doing anything drastic such as taking fewer flights or selling the car – the humble tote bag is pretty apposite.
Britain's half-hearted approach to Europe has been blamed by the mayor of Calais for the thousands of migrants who gather in the town trying to cross the Channel.
Such half-hearted approaches to innovation have a devastating effect.
Half-hearted approaches are unlikely to make any significant change in the plethora of treatment regimens proffered by private practitioners even after two decades hence.
"We cannot continue to stumble from tragedy to tragedy, issue by issue, with a half-hearted, piecemeal approach from social networks, when it is already too late and a parent has lost a child," said Peter Wanless, chief executive of NSPCC.
Problems arise when we see a half-hearted or confused approach to reducing the body.
The mobile aspect of Yahoo's operations once held a lot of promise, although it failed to follow through on some of the early leads it had made in the space, and more recently has been very half-hearted in its approach.
