Allocator 5 Rollback
One of the main features of Allocator 5 is the ability to include a degree of randomness to the allocation,
which causes some amount of new growth to occur in areas with lower desirability scores. The amount
of “randomness” that is used in the calculations is set by a variable assumption, which ranges
from 0 to 10. 0 means strict-order allocation, in which growth order exactly follows desirability
scores, and 10 means almost completely random, in which desirability scores are mostly ignored. The amount
that desirability scores are randomized is re-run each time the allocation is run, so re-running an allocation
with the same randomness value rarely results in the same allocation calculations.
Shortly after the release of Allocator 5, users began requesting information about how to choose a
randomness setting and visualize how different randomness settings affect allocation results. With
this newest version of Allocator 5, there is a new tool called the Allocator 5 Rollback, which allows
you to experiment with the randomness setting and return to the last results if you do not like the
new ones. For example, a user might choose a lower desirability setting (e.g., 3) but explore how
higher settings (e.g., 4) result in slightly more randomized growth patterns. With Rollback, the user
can return to the previous setting (3) and expect the same allocation results. Prior to the development of
the Rollback, users needed to create multiple alternative scenarios using different randomness values and
explore the differences by comparing scenarios. In some instances, this work-around technique may still be
useful for exploring different allocation settings.
The Rollback is available only under specific circumstances: when the randomness assumption value is
changed within the Allocator 5 wizard and it is the ONLY input that is changed. The Rollback is a
separate command from the Allocator 5 wizard and can be found in the Scenario 360
toolbar menu | Tools ► | Allocator 5 Rollback.