When you implement Salesforce, you must integrate it with other applications for higher organization wide productivity. Although, each integration scenario is unique, there are common requirements and issues that must be resolved. Architects and developers understand integrations needed in-detail and apply best practices during the design and implementation phase of a Salesforce integration project. Once implemented, you to get to production as fast as possible and have the most stable, scalable, and maintenance-free set of applications possible.
Choosing the best integration strategy for your system is in the hands of a expert team which consists of Architects, Project Managers, Developers, Testers etc., but the most important differentiator is a team that's certified and understands the dynamic changes Salesforce platform has undergone and upcoming, current roll outs.