In contrast to coupling, cohesion is the "act or state of sticking together" or "the logical agreement." Cohesively integrated source and target systems are independent from one another. Changes to any source or target system should not affect the others directly. In this scenario, information can be shared between systems without worrying about changes to the applications or databases, leveraging some type of In contrast to coupling, cohesion is the “act or state of sticking together” or “the logical agreement.” Cohesively integrated source and target systems are independent from one another. Changes to any source or target system should not affect the others directly. In this scenario, information can be shared between systems without worrying about changes to the applications or databases, leveraging some type of loosely coupled middleware layer to move information between applications and make adjustments for differences in application semantics. Most data integration product leverage the notion of cohesion. Software Development