My work consists in doing a number of projects with multiple different teams across the company, as well as handling some day-to-day requests from individual colleagues, again across different departments and offices of the company.
I think I have reached a stage where my reports and I cannot handle everything without the continuous support of another team, which often works together with us but is scarce in resources. Either we have to miss deadlines or need more people. Or we work incredible hours overtime, and I start feeling physically bad about this, without sleep.
Now a problem is that my boss always asks to back up any claim I make with numbers, time and averages, but the workload and pace has become extremely unpredictable and volatile - which means that planning and re-planning (this involves a lot of coordination across different teams, setting up meetings, etc.) also requires extra time.
So it is hard for me to communicate that we need more time or people, because it may be that on one day we're relatively calm and free of any day-to-day requests, but on the next day we manage to do only half of what was requested from us.
My boss sometimes asks redistributing deadlines, i.e. convincing those who request us to push back deadlines, but this causes additional issues.
Everything is connected... I am stressed that I cannot even explain properly.
Let me put it this way: I am absolutely convinced that we need more people (or more time) but I am finding it hard to figure out how to properly communicate it / how to back the claim to my boss
So how can I properly communicate the issue?
@Mike van Trufflebutt - the other team helping us are technical resources with skills/access/authority none in my team has. All their work needs to be done in coordination with other things going on in the company. They work a lot with the technological infrastructure and databases etc (I and my team are non-IT staff). We are not off-loading work to them - they are the only ones capable of doing most of the tasks that would enable us to properly do our jobs. We often have delays, lags, etc. because they are insufficient. So they MUST do work for us, but it often happens very late. I hope this clarifies.