What it means
Traditional margin analysis ranks products by profit per unit and stops there. That works only if every product consumes the same amount of the scarce resource, which is rarely true when one machine, one team or one oven is the bottleneck of the whole operation.
Profit velocity fixes the blind spot by bringing time into the calculation. Once you divide profit by the hours a product consumes at the constraint, the ranking often reverses, and the item the sales team loves because it carries the biggest ticket price can turn out to be the worst use of capacity.
The idea belongs to the family of throughput thinking, where the goal is to maximise profit per unit of the constrained resource rather than per unit sold. It applies just as well outside manufacturing: a law firm can measure profit per fee earner hour, and a builder can measure profit per crew day.
Applying it requires two honest numbers, the profit per unit and the time each unit takes at the constraint. Profit here usually means selling price less truly variable costs, since fixed overhead does not change with the mix and including it muddies the comparison.
There is one important caution. Velocity should guide the mix when capacity is genuinely tight, but if the machine sits idle half the week the constraint is demand rather than capacity, and turning away a slower job simply loses profit that nothing else replaces.
In practice
Real-world examples.
Example
A commercial printer discovers that its glossy brochure job earns $420 of profit but occupies the press for six hours, while a simpler flyer run earns $180 in ninety minutes. At $70 and $120 per press hour respectively, the scheduler starts filling gaps with flyer work.
Example
A dental practice compares a $900 crown taking two hours against three $180 check ups taking twenty minutes each. The check ups generate $540 in one hour of chair time against $450 per hour for the crown, which reshapes how the diary is booked.
Example
A specialist food producer finds that its premium sauce carries a 48% margin but occupies the only sterilising vessel for eight hours per batch. Switching half the schedule to a 32% margin line that needs three hours per batch lifts monthly profit without any price change.
Think of it
“Profit velocity shows how fast you generate profits from your assets-speed of value creation.
Formula
Calculation
Profit velocity ratio = profit per unit / time required per unit at the constrained resource
A cabinet maker has one computer controlled router that limits everything the workshop can produce, and it runs 160 hours a month. Product A sells for $1,500 with direct costs of $900, giving profit of $600, and takes 4 router hours. Product B sells for $700 with direct costs of $300, giving profit of $400, and takes 2 router hours.
Product A's velocity is $600 / 4 = $150 per router hour, while Product B's is $400 / 2 = $200 per router hour. Filling the month with Product A yields 160 / 4 = 40 units at $600 = $24,000 of profit, whereas filling it with Product B yields 160 / 2 = 80 units at $400 = $32,000. The lower ticket product generates $32,000 - $24,000 = $8,000 more profit from exactly the same capacity.Case study
Seen in the real world.
The following is an illustrative and clearly fictional example. Ardenmoor Joinery, an invented workshop with twelve staff and one large spray booth, always prioritised its bespoke staircase work because each staircase earned around $3,200 of margin. Standard door sets earned only $400 each and were treated as filler.
A fictional operations consultant measured spray booth time and found a staircase consumed 20 booth hours, giving $3,200 / 20 = $160 per hour, while a door set consumed 2 hours, giving $400 / 2 = $200 per hour. With 600 booth hours available each month, the mix mattered far more than anyone had assumed.
Ardenmoor kept enough staircase work to hold its reputation but deliberately filled the remaining booth time with door sets, lifting monthly profit by roughly $18,000 without hiring anyone. The illustrative point is that the workshop had been ranking work by the size of the invoice rather than by the speed at which profit arrived.
Watch out
Common mistakes.
- Ranking products by profit per unit alone, which quietly favours slow, capacity hungry items over faster earners.
- Measuring time against the wrong resource, since only the genuine bottleneck limits output and time on any other machine is effectively free.
- Including allocated fixed overhead in the profit figure, which distorts the ranking because those costs do not change with the product mix.
Questions
People also ask.
Is profit velocity useful when the factory is not busy?
Much less so, because with spare capacity the constraint is demand and almost any profitable order is worth taking.
What profit figure should go on the top line?
Selling price less truly variable costs, usually materials and any directly variable labour, which keeps the comparison focused on what actually changes with the mix.
Does this apply to service businesses?
Yes, and often more clearly, since billable hours are an obvious constrained resource and profit per available hour is easy to calculate.
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