There is an adverse action guideline in the banker's tool section that you might like.
My advice is to use excessive obligations when the debt to income is higher than you would typically allow prior to considering the new loan amount.
We use income insufficient when the debt to income ratios are within guidelines, but when you consider the new loan, the debt to income ratios go higher than we would typically allow.
Sometimes the questions are complicated and the answers are simple. - Dr. Suess