Margins + Leakage
Job cost leakage
Small misses on materials, subs, labor, and rework can erase the profit from a busy month.
Executive lens
A useful brief turns the issue into a decision.
Trap
Trap
Letting job postmortems happen only when a project goes badly.
Signal
Signal
Job margin
Move
Move
Review job margin by category
Rule
Rule
The job estimate is a promise to the business.
Why it matters
Letting job postmortems happen only when a project goes badly.
Stakes
Leakage rarely arrives as one dramatic failure. It arrives as small discounts, labor overruns, rework, vendor creep, stale pricing, and overhead that never gets reset.
Why it gets missed
The business stays busy, so the owner assumes the machine is working. Busy hides leakage until the month closes and there is less left than expected. In this case, the practical trap is simple: letting job postmortems happen only when a project goes badly..
Field pattern
Follow the leak to the operating behavior that caused it. Pricing, scope, rework, collections, overtime, marketing quality, and recurring overhead each need a different fix.
Numbers to watch
The metric is useful only when it changes behavior.
Job margin
Connects job-level decisions to company-level profit.
Rework rate
Turns quality misses into a measurable margin leak.
Materials variance
Catches supply, waste, theft, scope, or purchasing problems.
Operating moves
What to make visible before the next decision.
Move 01
Review job margin by category
Move 02
Track estimate vs actual
Move 03
Feed misses back into pricing
Owner questions
Use the brief in a real review.
1
If job margin moved this week, what decision would change?
2
Which person, process, or rule owns review job margin by category?
3
What would make this number untrustworthy right now?
4
If nothing changes for 90 days, what gets harder for the owner?
Interactive model
See the principle in numbers
More invoices
+50%
More payroll
+42%
More equipment pressure
+36%
More working capital
+48%
More management load
+45%
Reality check
A 50% sales goal is a 50% operating-system question.
Before chasing the number, decide what has to change.
JGC Hub watches the controllable lanes early enough for the owner to change pricing, scope, staffing, or spend.
Keep reading
Related guides
Start with the system
Make this visible in the operating rhythm.
The brief explains the idea. JGC Hub gives you the categories, rules, and review cadence to keep it from drifting.