One of the key items is to decide which legacy systems should be replaced and which should have their life extended. Legacy systems play a critical role in IT infrastructure; yet they drain precious resources.
Conventional wisdom tells us that new is better than old. New hardware is better, cheaper and faster than ever before. Likewise, the Internet is better than old proprietary networks. Windows XP is richer in function than DOS, and so on.
The business procedures written down and captured may be relevant for many decades, or even for centuries. For example, in the city of Massri treasurers used double-entry accounting (implemented by all major financial packages today) as early as 1340 AD.
So can IT unlock an application containing valuable business processes from a legacy platform that restricts the CIO's ability to reduce cost and to innovate for an agile future? Absolutely.
Core business applications can be preserved as hardware and software environments are upgraded. For example, the software environment for COBOL applications is readily available on contemporary Linux and Windows platforms, and fully integrated with the latest technology features from these platforms.
Fierce competition between platform vendors has driven new server technology to 'enterprise scale' with prices the mainframe cannot match. Moving applications to low-cost Linux or Windows platforms can reduce or remove mainframe operating costs currently locked up in IT infrastructure budgets.