ERP is a unique tool for streamlining complex business processes. And the larger the business, the more complex the business processes. On the other hand, many small businesses start in a single room or small office in which case all of your “departments” maybe a stone’s throw away from each other making the use of an ERP, redundant. As the business expands, the need for, and benefits of, an ERP become clearer. If at any point in time while doing business, a manager or executive doesn’t know the current business state of affairs, what’s going on in the departments that they are responsible for, you should know that it is now time for an ERP.In other words, the bigger and more complex your business, the more likely you are to need an ERP, especially in the case of MNCs.