Basically it all boils down to decision-making

Crunching numbers is part and parcel of an underwriter's work, but for SMU alumnus Soh Rui Na the decision-making aspect of the job is just as important. Ms Soh, 26, joined the industry three years ago after graduating with a Business Management degree. She is currently a senior financial lines underwriter at AIG Asia Pacific Insurance. She picked up most of the skills on the job, having received no formal training in underwriting, apart from attending a insurance module in her university finance course. Her first brush with the underwriting industry came when she did an internship at Amlin Singapore, a Lloyd's syndicate, before she took on her current role. During the internship, she spent two weeks at the company's headquarters in London, where she learned how the underwriting department worked hand in glove with other departments.

Source
The Business Times