The problem is if you knew enough about your business logic to plan out an ERP system beforehand, you wouldn't need an ERP system to begin with. The main benefi

The problem is if you knew enough about your business logic to plan out an ERP system beforehand, you wouldn't need an ERP system to begin with. The main benefit of either buying or building an ERP system is that it forces you to actually find out (or decide) what the flow of information in your organization is. It's a management consulting process that happens to play out in software.