There are four types of maintenance:

• Corrective maintenance
• Adaptive maintenance – modifies software to interface with changing environments such as new operating systems
• Perfective maintenance – gives new functionality
• Preventative maintenance – improves reliability of the applications

ATDI has a policy of continuous innovation and development and all customers with a valid maintenance agreement can upgrade their application throughout their technical support contract period.

All customer upgrades are accessible from the customer portal and are password protected. For more information about upgrades, maintenance agreements or authorisation please contact: support@atdi.co.uk