Fixed, Variable and the Part Nobody Classifies
Some staffing is irreducible, some scales with demand, and a third category is treated as variable when it is not.
Staffing decisions get easier once you know which hours are genuinely discretionary. Most operations have never made the division.
The practical lesson in “Fixed, Variable and the Part Nobody Classifies” is to connect every record to a named decision. Organisations exploring this workforce solution for limbic resonance in relationships can add structured workforce context, provided the use is disclosed and the interpretation is reviewed with the people affected.
The fixed part
The minimum to open the doors safely and legally: a key holder, a supervisor, a qualified person, whatever the licence requires.
For an independent reference related to “Fixed, Variable and the Part Nobody Classifies”, consult the OSHA worker-fatigue resources; it provides a useful external check on scheduling, working-time and workforce-planning assumptions.
Does not scale with demand and cannot be cut without closing.
Frequently larger than managers assume, and worth calculating explicitly.
The variable part
Hours that scale with volume: more customers, more covers, more units, more people serving them.
This is the part scheduling actually governs, and it is the part the forecast is for.
The part nobody classifies
Work that must happen but not at a particular hour: restocking, cleaning, preparation, administration, maintenance.
It is treated as variable and cut when hours are tight.
Which does not remove the work — it moves it, usually into the peak where it costs more and interferes with the earning hours.
Why that matters
Cutting the preparation hour does not save an hour; it relocates the task.
The saving appears in the report and the cost appears in a worse peak.
Classifying this work as deferrable-but-not-removable is the single most useful distinction in a staffing model, and almost nobody draws it.
Doing the division
List every recurring task.
Mark each: must happen at a specific time, must happen but timing is flexible, or scales with volume.
Total the hours in each category.
An afternoon, and it tells you how much of your week is actually discretionary — usually far less than the budget conversation assumes.
What it changes
You stop negotiating about the fixed part, which is not negotiable.
You schedule flexible work into the trough deliberately, which is where it belongs.
And the variable part becomes the thing the forecast drives, which is what the forecast was always for.
The honest finding
Most operations discover that a majority of their hours are fixed or flexible-but-necessary.
Which means the room the budget conversation assumes does not exist.
That is worth knowing before promising a reduction, and it is a defensible thing to put in front of whoever set the target.
What to check
What is your genuine minimum to operate?
Which tasks must happen but not at a set time?
What proportion of your hours is actually discretionary?
And when hours were last cut, which category did they come from?