> I can only speak for Microsoft's ERP, but everything that is impossible or hard to extended within the ERP itself can easily be extended through an outside application. And by doing so, you can probably even make the employees job easier by keeping the process the same, but giving him an UI that isn't overwhelming.

But then, did you really gain anything by using an ERP instead of just a dumb database, which would have worked just as well as backed for those applications?