Corporations go for ERP either to solve the existing problems or to explore new opportunities. I call these two approaches as negative & positive approach respectively. One aspect of the negative approach forces some corporations to go for ERP to solve their Y2K problem.
This is particularly true of those corporations that are heavily dependent on legacy systems running on old main frames. The second aspect of the negative approach is to get over the problems of islands of heterogeneous and incompatible information systems that were developed over the past several years in many organizations.
Functional IS modules representing areas such as Finance, Marketing, HR, and Production in these organizations would be running on diverse hardware and software platforms leading to nearly insurmountable problems of reconciling data locked up among the diverse systems. From a positive perspective many organization look at the great opportunity provided by ERP software that lead to almost instant access of transactional information across the corporation.
Such an information rich scenario permits organization to reduce inventory across multiple units/ departments/ plants; reduce cycle times from weeks to hours; and improve customer satisfaction by orders of magnitude. All these translate to increased profitability or increase in market share and in turn much larger market capitalization. However ERP is only means and not an end by itself.
ERP provides an opportunity for a corporation to operate as an agile entity to improve production / operation, customer service and customer satisfaction. The creative ingenuity of an organization to drive towards these corporate goals determines the extent of success an ERP implementation can deliver.   _{Your Comment}