Customizing an ERP package can be very expensive and complicated. Some ERP packages are not designed to support customization, so most businesses implement the best practices embedded in the acquired ERP system. Some ERP packages have very generic features, such that customization occurs in most implementations. It is also often possible to extend the standard ERP package by purchasing third party software to provide additional functionality. Customization work is usually undertaken as bespoke software development on a time and materials basis.
Customization can be further classified into:
- Core system customization
- custom extensions in custom libraries.
Core system customization is where customers change the software vendors’ proprietary code. This means that the software will no longer be supported by the vendor for the particular function that was customized as the code would be modified to the customers need. The customers IT department will then normally support the code in-house or subcontract a consulting organization to do so.
Custom extensions are where a customer build bolt on custom applications that run parallel to the standard system i.e. custom extended applications. Modules that are extended but core code not changed remain supported but the extensions will have to be supported by the customers IT department or subcontracted consulting organization.
Maintenance and Support Services involves monitoring and managing an Operational ERP system. This function is often provided in-house using members of the IT department, but may also be provided by specialist external consulting and services companies.
ref: wikipedia, insurance software
