The idea is to take a scaled down but realistic business problem and collaboratively represent it, and design solution(s) architecture.
By taking help of this forum will allow one to have different viewpoints.
I guess there should be no objection if we take the approach: domain model, description, use cases, class diag, interaction diag, component diag, deployment diag, risk list, and assumptions.
What do you say? If you think positive, I can start a
thread with the outlines of a business problem.