Hi,
While I don't like to say it as you see it -> this is a real bad process mapping. You have to relook at the process.
Billing Plan as articulated by others is only used in two ways -> Periodic or Milestone Billing.
then you might be better off with looking at PS features too. That way they might seamlessly work for your process.
Apart from that, there seems to be an issue with how the revenue is recognized too. You guys really need to go back to the drawing board.
Without going into too many details if the Projects which are being mapped through your process, if they are:
- Complicated
- Frequent
- Need Detailed Tracking
then you might be better off looking at the PS features.
Hope my opinion is something which you guys will think about for process betterment.
Thanks.