As a business analyst, one capability that is very important is the ability to learn a new domain.
All aspects of the domain need to be understood as it forms the basis for many activities a business analyst needs to carry out.
A solid understanding of the domain helps a business analyst facilitate good decisions for clients.
A solid understanding of the domain allows a business analyst to identify risks and opportunities.
A solid understanding of the domain allows a business analyst to design effective solutions.
A solid understanding of the domain allows a business analyst to formulate effective strategies.
An effective understanding of a domain involves not only learning the domain, but combining the new understanding with patterns and paradigms for all domains a business analyst has learned.