The phrase "a viable question" is correct and usable in written English.
It can be used when discussing the validity or relevance of a question in a particular context.
Example: "In our discussion about climate change, I believe that asking whether renewable energy sources are sufficient is a viable question."
Alternatives: "a valid question" or "a pertinent question".
Supervisors are most concerned about whether the student researcher has a viable research question to pursue (Cadman 2002), a concern shared by the specialist informant in the present study.
What early humans ate, how food was acquired and processed, even how it was distributed among members of a social group, became viable questions.
If enough people will do that for YourTour to become a viable business, remains the question of course.
However, this study has shown that there is a need to bring such an initial exploration to a next level by finding a viable approach to how questions collected as data may then be the subject of detailed scrutiny and analysis.
An important factor to consider is that finding a viable template is not a question of product quality.
Second, the development of Augustine's thinking on the will, as unsettling as the resulting moral landscape may be, does oblige one to confront questions about what a viable concept of the will should involve as well as questions about how to determine moral culpability in the face of external determination questions that are as easy to overlook as they are difficult to address.
It is proposed that statistical planning for the use of enzymes derived from nematophagous fungi is a viable way to elucidate some questions about their mechanism of action.
In November 2009, we ran an article that explored the difficult economics of opening a cupcake shop, and we asked this question: Are cupcakes a viable business?
Whether that's a viable monetization scheme … is the question.
Next question: Is there a viable market for your product or service?
