Open a segment and use the calculate allocation to capacity or to available option to have Kelloo work out the optimal allocation level for you. Kelloo examines the capacity and availability for the duration of the work to decide on the allocation.
To capacity
When you calculate to capacity, Kelloo will allocate the work to the resource's maximum capacity through the period of the work.
In the following example, Lucas works 5 days per week. He is allocated to two pieces of work, each 2 days per week.
If we ask Kelloo to suggest the maximum allocation to capacity, it suggests 10 days as Lucas has underlying work capacity for 10 days through the work period. This would cause an overallocation as he is still assigned to work on Project Pink.
Allocating to capacity will cause an overallocation if the resource is assigned to other work through the period.
To available
When you calculate to available, Kelloo will allocate the work to the resource's maximum availability through the period of the work.
Following on from the example above. If we instead ask Kelloo to suggest the maximum allocation to available, it suggests 6 days. He is already allocated 2 days per week on Project Pink leaving 6 days to allocate to the work on Project Purple.
Allocating to available will allocate to the maximum level without causing an overallocation taking into account other work assigned.