I'm interested in forecasting Business PM hours monthly as part of a large organization in a big company. Storyline: PM1 has a portfolio, managing 3 enterprise projects
PM1 is a liaison for 6 projects outside of PM1's org . (Liaison example: PM1 is a resource in case any of those 6 projects have questions or needs resources from PM1's org.) PM1 attends 3 IT Meetings / week
Assumptions: No PC's Project allocation hours only PM only
Is there a standard or ratio of administrative time to project time for allocation? Is there a good assumption for figuring in Ad-Hoc meetings? Saving Changes...
No - this really depends on the individual's workload as well as how administratively onerous a given company's project management methodologies & tools are.
To put this in perspective, I worked for one company where a fully dedicated PM still spent close to 50% of their time on project administration given the extremely heavy nature of their standards & governance and the low usability of their mandated PM tools.
At a department level, time actuals over a period of time (e.g. one year) can be used to figure out a reasonable percentage for non-project allocation, but that is susceptible to all the downsides of forecasting using your rearview mirror.
With 50% in admin tasks, surely meetings would be 20-25%, so that doesn't leave much time for the project. Agreed though that this happens more often than people imagine.
There is no standard; only individual practitioners' experiences. For myself, I would say it is averaged at 30%. However I'm guessing the old 80/20 rule applies to estimating administrative time for most projects. Saving Changes...
