Before You Buy Another Truck, Do This Math

Another truck is an expensive way to store a scheduling problem.

Before you hire, buy equipment, or rent the unit next door, answer one question: Are you actually out of room—or just bad at using the room you have?

Being frantic is not a measurement. Neither is your dispatcher saying, “We’re absolutely slammed.”

What capacity utilization actually means

Capacity is how much work your business can realistically deliver with its current people, equipment, space, and schedule.

Capacity utilization is how much of that ability you actually use.

Capacity utilization = productive capacity used ÷ practical capacity available × 100.

For a service crew, measure productive labor hours. For a clinic, appointment minutes by provider and room. For a repair shop, staffed bay-hours. For a gym, usable class spaces or coaching slots.

Pick a unit that reflects delivery. Revenue alone won’t do it: a higher average ticket can increase sales without consuming another hour.

And measure completed work, not just bookings. A calendar full of cancellations is very busy wallpaper.

Count the hours you can actually sell

Here’s an illustrative service business with four technicians working 40 hours each week.

• Paid hours: 4 × 40 = 160.
• Normal travel, breaks, meetings, and necessary non-job work: 40 hours.
• Practical productive capacity: 160 − 40 = 120 hours.
• Actual productive hours delivered: 90.
• Capacity utilization: 90 ÷ 120 = 75%.

That business has 30 unused productive hours on paper. It does not automatically need a fifth technician.

But don’t cheat the denominator. Deduct reasonable, necessary overhead—not every wasted hour after the fact. Otherwise, missing parts and aimless driving magically become “normal,” and your utilization looks wonderful while your cash flow wheezes.

Set a realistic capacity allowance, then record avoidable losses separately. Track callbacks too. They consume capacity without creating another sale, and ignoring them makes your productive output look healthier than it is.

Use consistent definitions every week. Precision beats a spreadsheet with seventeen colors and no connection to reality.

Find the thing that actually limits output

Company-wide utilization can hide the real problem.

Suppose your general technicians have open hours, but your only licensed specialist is booked solid. You cannot pour those spare hours into the specialist like petrol into a tank.

Your bottleneck is the resource that limits how much finished work gets out the door.

It might be:

• The only technician qualified for complex work.
• A treatment room that every provider needs.
• One machine shared by three employees.
• Estimates waiting for your approval.
• Parts that never arrive before the crew does.

Measure utilization at that constraint, not just across the business. Check specific days and times too. Empty Tuesday mornings won’t solve a shortage of Saturday appointments unless customers will move.

Sometimes the right investment is another specialist. Sometimes it’s cross-training, better purchasing, or getting you out of the approval queue.

SOPs can remove repeat delays. Better scheduling can cut travel. Neither requires another vehicle payment.

Leave room for real life

One hundred percent utilization is not automatically the goal.

A schedule with no slack has no room for an emergency, an overrun, or somebody calling in sick. One awkward job wrecks the afternoon. Then overtime eats net profit and late arrivals start appearing in your reviews.

For this example, suppose the owner chooses an 85% planning target. That is a working assumption, not a universal industry benchmark. Predictable appointments can support tighter schedules than unpredictable emergency work.

At that target:

• Practical weekly capacity: 120 hours.
• Target productive output: 120 × 85% = 102 hours.
• Current productive output: 90 hours.
• Room before the target: 12 additional hours a week.

If each extra productive hour generates $150 in revenue, those 12 hours represent $1,800 a week, or $7,200 over four weeks.

That’s revenue, not profit. Deduct materials, commissions, extra wages, and other incremental costs. Gross margin tells you how much survives direct delivery costs; the truck payment still wants feeding afterward.

Make expansion pass two tests

First: Is there enough profitable demand?

Review eight to twelve weeks, and compare similar seasonal periods if your work swings with the weather. Track qualified jobs declined, booking delays, cancellations, and customers who left because you couldn’t fit them in.

Don’t count every inquiry as waiting revenue. If demand is weak, another employee won’t fix it. Check conversion, cost per lead, and pricing before buying more delivery capacity.

Second: Will the added capacity pay for itself?

Suppose another technician and truck add $9,000 in monthly costs, including wages, payroll burden, vehicle costs, insurance, and tools. Assume materials and other job-variable costs consume 25% of additional revenue, excluding costs already in that $9,000.

Break-even additional revenue = $9,000 ÷ 75% = $12,000 a month.

At $150 per productive hour, that requires 80 additional hours a month just to break even. At four weeks per month, that’s 20 hours a week.

Can you reliably sell and deliver those hours after using the space you already have? Can you fund recruitment and ramp-up before collections arrive? Check labor percentage after the hire, not just before it.

If the answer is “probably,” keep the truck brochure closed.

What to fix first on Monday

Pull the last four weeks of schedules and time records.

• Calculate practical capacity and completed productive work.
• Separate necessary overhead from avoidable lost time.
• Identify the most constrained person, room, machine, or step.
• Assign one fix for the biggest recoverable loss.
• Recheck weekly while building a longer demand history.

Fix the largest recoverable capacity leak first. Then add resources where sustained, profitable demand exceeds what your current operation can reliably deliver.

Buy capacity because the numbers require it. Not because everyone looks knackered.