I am trying to distribute multiple projects over months according to a custom distribution key.
I found a post regarding fixed distribution curves (i.e. Bell curve) but need to be able to custom construct multiple curves depending on project scope to get accurate output.

Ex:
Total project man-hours: 1000
Project duration: 11 months (variable input depending on scope of single project)
Periodization (Ex):
1st quartile of total project duration - 28% of total hours
2nd quartile of total project duration - 33% of total hours
3rd quartile of total project duration - 24% of total hours
4th quartile of total project duration - 15% of total hours

I am not sure quartile is the correct cut-off (may be 20 percentiles etc)

Advice would be extremely helpful as I (and my project) am stuck...

Anders