Guidelines for when integration of your ERP with a 3rd party application is appropriate
The upside to buying enterprise resource planning (ERP) that is not custom-written exclusively for one company is the economy of scale. Since it is written for the masses, the cost per user plummets. Microsoft Office certainly costs much more to develop than the few hundred dollars it costs to license. One of the other upsides is thousands or tens of thousands of users create a robust community that quickly flushes out weaknesses in functionality, helping the software become stronger.