The phrase "a challenge of how" is correct and usable in written English.
It can be used when discussing difficulties or obstacles related to a specific method or approach to a problem.
Example: "The project presents a challenge of how to effectively integrate new technology into our existing systems."
Alternatives: "a difficulty in determining" or "an obstacle in figuring out".
That doesn't promote diversity, and presents a challenge of how much time people can give to each committee because it is certainly a big commitment.
With more American households giving up their old-fashioned land lines and using cellphones for all calls, public opinion researchers are facing a challenge of how to make sure they are getting representative samples when conducting polls.
However, added Mr Blaber, such swift growth posed a challenge of how to help customers discover useful software from all the other code on offer.
However, the next paradigm is the integrated use of both materials, which poses a challenge of how to join the dissimilar materials.
Today, USAID faces a challenge of how it will support developing country vaccination programs.
However researchers are faced with a challenge of how to ensure that a volunteer agreeing to take part in a clinical trial is truly informed.
No leader in history had ever faced such a challenge of determining how to use such a revolutionary means of exercising responsibility.
Such a collaborative ontology matching poses a new challenge of how to reduce users' workload, but at the same time, increase their involvement's value.
"Now we are facing a new challenge of how to improve their living standards.
Mr Williamson said: "The Bank of England is facing a growing challenge of how to convince the markets and households that interest rates will not need to rise over the next three years.
"It's important that we achieve our benefits in medical and health without undermining what is humanly decent and dignified," said Dr. Kass, who is 62. "New technology made possible by the wonderful science of biology poses a real challenge of how to do that.
