IT services firm Accenture Plc's revenue increased by 15% year-on-year to $15.4 billion in the fourth quarter ended August, according to its filing. Its revenue from consulting was up 14% to $8.33 billion, while that from outsourcing increased by 16% to $7.09 billion. The Dublin-headquartered company's bookings increased by 22% to $18.4 billion, against the $16.99 billion estimate.