because erp systems are complex and expensive, choosing one is not an easy task. in doing so, you must take great care to ensure that the erp system has a module for every critical company process and that you are not paying for software modules that you do not need. one way to choose a suitable system is to select a package designed for your industry. although cost is a huge concern, buying too cheaply can cost more in the long run if the system does not meet your needs, because modification costs can be quite high. you can minimize the risk of buying the wrong package by researching the best erp vendors. there are many erp vendors, the two largest being SAP and Oracle. Other leading vendors are the Sage Grop, Microsoft, and Infor.