System Integration - Discussion Board 1

 It is said that almost every company or enterprise has a variety of applications and systems which are necessary for its operations to be conducted in a systematic and coordinated way. Most of the times, this integration of applications and systems is a business requirement as well. But it can become a substantial test for IT. As a student of Information Technology, discuss at least three major challenges that System Integration is facing in this era. 

I need one answer for the Discussion Board and 3 responses for students.

Each responses 3 lines or more.

Thanks,