Improved billings over year-end 2014 and an increased number of inquiries contributed to an optimistic economic outlook for U.S. interior design firms at the end of first quarter, according to the American Society of Interior Designers' (ASID) Interior Design Billings Index (IDBI).
ASID's IDBI registered 57.7 at the end of March, compared to 52.3 in December. New project inquiries registered 58.8 at the end of the first quarter, rising two points over December.