Hours of work due per manager per week, from each engagement's deadline, its hours from last year's time entries, and a stated lead time over which the hours spread. Against roster capacity less leave, the excess is visible months out, and reassignments and early starts flatten it.
Thirty-one filings in a week is a number. A hundred and four hours against thirty-four is a plan.
The moves need weeks to work. A curve drawn in the peak is a report, not a plan.
For each manager and week, the hours of work due, taken from each engagement's deadline and last year's hours, against the hours available.
In the third week of January one manager has 190 hours due and 130 available, while a colleague has 85 due. Moving four engagements in November avoids the problem.
Planned by month. The crunch is a particular week for a particular person, and a monthly total hides it.