The phrase "unconventional approach" refers to taking a different or unusual way of doing something, rather than following the traditional or expected method. Full definition
As far as taking unconventional approach to problems is concerned, today's venture capitalists and mentors have shown that their investments patterns are based on actual problem - solving and innovative models. (entrepreneur.com)
I teach a college student leadership class, and though I take a rather unconventional approach to the topics we cover, one of the modules is on personal vision and mission statements. (nakedpastor.com)
They are able to apply unconventional approaches to overcome challenges. (ingramspark.com)