You could create a pseudo-contract or pseudo-lease. For example, you could pretend that the Dell 380 purchased on April 4, 2009 is actually part of a 4-year lease in order to match your policy of rotating equipment once it becomes 4 years old. The lease end date could be termed April 4, 2013. You could then pull a report of upcoming lease expirations and correspondingly locate the assets.
Alternatively, you could create a custom data class attribute for the Computer configuration item type called Purchase Date and then pull a report against this data class attribute.
This leaves you needing to determine purchase date for your existing assets. Some ideas:
-
Look up each system by Service Tag on a support site, such as support.dell.com
-
Define existing hardware models and then enter an approximate date for each model based on a support site like support.dell.com
-
Define existing hardware models and then enter approximate guesses
-
List all hardware by specifications (RAM, CPU, HDD, etc) and then divide by your rotation (e.g. 48 months), and add each section to a month, starting June 2006 and moving through the current month, June 2010
-
Do not import date values; only enter dates going forward
Does this help?