I've had the following request from a producer:
"More often than not on a VFX show we'll assign multiple shots to an
artist and they will work on each shot at the same time, bringing them
all up to the same level in unison.
ie. If they have 3 tasks with 10 days each and are working on all tasks at the same time, you could say they are spending 33% of their time on each task, meaning the duration for each is 30 days, not 10.
Currently Shotgun appears to limit you to a set duration, which isn't very favourable as it looks like the artist is behind schedule.
In project you can specify the % that resource is assigned to a task and it will adjust the duration accordingly."
I guess basically what they'd like is to be able to set the start date and duration of a task, plus a new "% Assigned" field, and it would divide the duration by the % when calculating the end date.