Hi Sarah,
Ofcourse you do as ServiceNow is one of the vital sources of information. You could look forward for getting the following info at a minimum from ServiceNow
- Logical Servers, Physical Servers and Hypervisors
- Applications and their relationship to underling infrastructure
- storage allocated to servers and apps from different storage tiers
- DBs related to apps and servers and how much storage they consume
- which apps and components have supporting contracts and their contract IDs (this will be very useful with vendor insights)
- Incident, Problem and change tickets ( depending on what and how you want to model your allocations), FCR, etc.
- Application SLAs achieved and how many tickets are being resolved by which team (again this will be dependent on how you are modelling your costs)
- IT Service request information to allocate costs to end users and BUs based on their requests
- complete inventory of links and their associated BUs so that you can allocate the right cost to the respective BU.
And depending on what additional modules you, in this case assuming performance monitoring, Application portfolio management anf hardware and software asset management, the followong may be used additionally:
- complete inventory of end user devices by BU and location(if reqd)
- Project information and Capex spend on making an Application live
As Joy mentioned, when you look at Data advisor that will give you a good starting point.
Hope this was helpful.