The phrase "a markedly different approach" is correct and usable in written English.
It can be used to describe a method or strategy that significantly differs from others in a particular context.
Example: "The researchers adopted a markedly different approach to studying the effects of climate change on local ecosystems."
Alternatives: "a significantly different method" or "a distinctly different strategy."
After huge numbers of air traffic delays last summer, the Clinton administration has decided to take a markedly different approach this year: asking the airlines what to do.
That is a markedly different approach to the ATO, which uses a flat fee, reducing the financial incentive for private firms to pressure debtors into repayment.
Together, experts say, the developments seem to be opening a new chapter in juvenile justice only two decades after a markedly different approach took firm hold.
These glossy monthlies took a markedly different approach to rock journalism, replacing confrontational interviews and expansive think pieces with star profiles and short, consumer-oriented record reviews.
Operating in stages is a markedly different approach from that taken by the surgeons at Children's Medical Center Dallas who separated 2-year-old twins from Egypt last weekend in one operation that took more than 30 hours.
Using a series of operations to separate twins joined at the head is a markedly different approach from the one taken by surgeons in Dallas who separated 2-year-old Egyptian brothers last month in one 33-hour operation.
Recent research showed that the PharmaCo drug was much more effective when patients exercised regularly, so the team explored offering discounted or even free gym memberships a markedly different approach that looked at total well-being, not just the medical treatment of symptoms.
European banks taking a €3 billion, or $4.2 billion, hit on their Greek bond holdings earlier this month employed markedly different approaches to valuing the debt.
David Vaile of the Cyberspace Law and Policy Center at the University of New South Wales said China and Australia had markedly different approaches to restricting the Internet.
