Change & Config Management Staffing Ratio : LUSENET : Service Level Management : One Thread

Has anyone got any details on ITIL Change Management staffing ratio i.e. #Change Managers to #Full time IT Staff

Has anyone got any details on ITIL Configuration Management staffing ratio i.e. #Configuration Managers to #Full time IT Staff

Any advice greatly appreciated.

Tah Jenny

-- Jenny Deital (, October 21, 2002


I don't have the ITIL stats, but change and configuration management are functions of how complex and stable your environment is. For example, if you're standardized on systems that are subject to a stream of vendor patches and fixes, then the ratio is going to be more skewed than if you're in a more stable environment.

Another factor is the complexity of the patch and fix process, such as the very detailed and structured process that is required for PeopleSoft (for example). Also note the dependencies between change management and QA, and among configuration, asset and change management.

There is a formula that you can use, then add a coefficient or adjustment (based on complexity and stability) that will at least get you into the ballpark. (I think the source is the State of Texas HR - I don't keep track of everything I stumble across and keep):

Management-to-staff Ratio = [N+(S-1)]/S


N=Number of non-supervisory employees

S=Combined number of supervisors and managers

"S minus 1" excludes the top agency executive from being considered a supervised employee. Therefore, for those agencies that are directed by more than one top executive, A S minus 1" will be replaced with "S minus the number of top executives." For example, if your agency does not have an executive director, but is directed by three full-time, salaried commissioners, the formula "[N+(S-3)]/S" will be used.

-- Mike Tarrani (, October 21, 2002.

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