This excerpt taken from the SNPS 10-K filed Jan 12, 2005.
The decrease in total revenue for fiscal 2004 compared to fiscal 2003 was due primarily to: (i) a lower level of orders than expected in fiscal 2004; (ii) our shift in the fourth quarter to an almost completely ratable license model; and (iii) a decrease in maintenance revenue. The increase in total revenue for fiscal 2003 compared to fiscal 2002 was primarily due to: (i) contribution of products from the Avant! acquisition, which was completed during the third quarter of fiscal 2002, for all of fiscal 2003; (ii) continued phase-in of the ratable license model; and (iii) license renewals with many of our largest Japanese customers in the second quarter of fiscal 2003, a relatively high proportion of which were perpetual licenses yielding upfront revenue.
With our further shift in license mix beginning in the fourth quarter of fiscal 2004, we expect total reported revenue for the first three quarters and full fiscal year 2005 under the new more ratable model to be below the comparable periods in fiscal 2004.