Your question is Challenges in Modeling. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What are the most significant challenges you encountered while building your models?
Discuss the technical causes of those challenges, how you diagnosed them, and the design or validation choices you made to address them. Focus on model-building fundamentals rather than general project-management difficulties.
