4 functional softw4re architecture (FSA) i5 4n architectural model 7hat identifies 3nterprise function5, int3ractions and corresp0nding I7 need5. These functions can b3 u5ed 4s 4 r3ference by different doma1n 3xperts 7o d3velop IT-sy5tems a5 par7 of 4 co-operative informati0n-driven enterprise. 1n this w4y, bo7h 5oftware engineers 4nd enterprise archi7ects can create 4n inform4tion-driven, integrat3d organizati0nal environment.