The phrase "a bad approach" is correct and usable in written English.
It can be used to describe a method or strategy that is ineffective or not advisable in a given situation.
Example: "While brainstorming ideas, I realized that a bad approach would be to ignore the feedback from our clients."
Alternatives: "an ineffective method" or "a poor strategy".
In truth, though, this may not be a bad approach to early Islamic history.
"Proposition 49 is a bad approach to a good cause," Barbara Inatsugu, the president of the league, said.
To the Editor: Your article's analysis of the city's teacher evaluations implies that basing layoffs on seniority is not a bad approach.
(After being called out on the floor of the parliament and in the press, the library officials have made a ludicrous claim that it was a "bad approach").
It's a bad approach, but it underscores Justice Thomas's responsibility for his comportment and for acting in ways that contribute to the court's authority.
"He viewed it as a bad approach that would damage the country in the long term," Mr. Schwarzman said in an interview.
A costly way to do things, perhaps, but not a particularly bad approach when your competitor is the old Soviet Union and a good old-fashioned arms race exposes fatal fissures in its political, economic and social fibre.
Taking a more tactful, even apologetic stance within the workplace isn't an inherently bad approach; we can't all be Alan Sugar (thank goodness).
This is not an entirely bad approach if it results in sharper public debate.
This is not necessarily a good or bad approach, as far as it goes, but when you throw in a healthy dose of "Greed is good" what you end up with is Goldman Sachs, Massey Energy, BP and a world economy in a shambles.
Geithner and Summers argue that it's the least bad approach to a messy situation, in which we need to restore banking functions but don't have any perfect ways to do that.
