Each Problem is just a case of possible situations that I’ve seen in real life with teams I was coaching and working with. So, as in real life, each problem may have more than one solution.
The main criteria – ask the group: “In your real work, would you apply such Solution to this kind of Problem?”. If the group could come up with an example or idea of how to apply this Solution – this is probably the right solution 😉
Technically, by game design, each Problem may be solved with more than one Solution or Event card.