Looks like a growth opportunity to me!
Remember that:
- The customer cannot know how much effort each piece of work takes.
- The customer cannot know how much work you have already committed and how much bandwidth is left.
So, stop looking at it as someone is trying to slam you.
- Make an estimate of each work item.
- Is there any low priority work that you have committed? Can you negotiate to get some of that defereddeferred?
- See what productivity improvements you can make through process improvements, automation...etc.
- Be sensitive to the customer's need for urgent work and priorities. Be prepared to add resources to bring the timeline in.
Go back with a proposal of when you can realistically deliver each work item. If the timeline is not acceptable, propose additional funding to add resources and what timeline improvement that can get.