A well-suited problem usually shows one or more of these traits.
The scope of your problem is unknown or unbounded.
In plain terms: unknown—you know you have a problem, but don't fully know what the problem is, or unbounded—you know what the problem is but you don't know what it's going to take to solve.
Your problem requires broad or deep understanding.
Broad, or call it wide, cross-functional, breadthy: essentially, a large number of domains, disciplines, silos, or organizations. Deep, is the level of knowledge or expertise required within each part of the problem scope. You may have a challenge of breadth, depth, or both. You need capabilities you don't have available.
It requires urgent or immediate action.
We all know, it takes time to mobilize resources, be they your own internal MVPs, consultants or 3rd party vendors. Or, it could be you just need to cover gaps in a specific area you need to fill quickly. When it's about now, today, tomorrow — days, vs. weeks or months.
It involves sensitive or nuanced matters.
As the saying goes, companies are people. And yours is no different. There will always be personality conflicts, professional infighting, departmental conflicts, HR issues — it could be anything. Any one of which could limit your ability or capability to respond or take action.