We always have our pizza pie double sliced… that is our historical and proven apportionment for my family.
Small slices yield least waste: you pull the next slice according to need.
We employ the buffet rule: ‘Take but eat all you take’.

In SAFe … apportionment of the Agile Teams’ and ART capacity is also happening… we call this ‘happening’, ‘Capacity Allocation’.
Allocate and pull according to need. Prioritized need — doing the right thing at the right time. If you do not need a big slice now, then do not take a big slice. Employ the buffet rule.