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Synthetic worked example — not client data

Worked Example · Field Services

The contracts all looked the same. They weren’t.

A $22.4M mechanical services company is heading into renewal season guided by a margin report showing every maintenance contract inside a comfortable 32–39% band. Honest attribution of overtime, callbacks, travel, and fleet cost puts the real band at −5% to +43%.

Educational example with an invented company and figures. The visuals demonstrate reporting logic; they do not represent clients, results or realized savings.

The Signal

Gross margin by contract

Switch the view. Same dollars, same twelve customers — the only change is where the cost lands.

As reported
After diagnostic
Blended GM35.6%
Spread6.5 pts
Below breakeven0 of 12
Positive margin Negative margin

Margins this uniform are usually a sign of allocation policy, not operational reality. Twelve customers with different buildings, densities, and service intensities do not naturally land inside a six-point band.

Contract Detail

The change, contract by contract

Ordered by how far the reported number sat from the truth. Shaded rows fall below overhead recovery.

Reconciliation

Where the margin went

Four cost pools sat below the line, attributed to no contract. Nothing was hidden — it was simply never assigned.

Same dollars, honestly placed. Overtime premium on after-hours callbacks sat in a payroll pool. Warranty rework was booked to a general account. Travel ran on a flat 4% assumption and fleet was charged per technician rather than per route-hour.

Concentration

Size is not profitability

Revenue on the horizontal, true margin on the vertical. The second-largest contract in the book sits well below overhead recovery.

In the monthly service

Maintain the logic with the report.

Relevant definitions and checks become part of the agreed model and monthly cycle. This example shows the financial depth available within the reporting service.

Allocations, margin definitions and assumptions must be adapted and validated for each business. A reporting correction is not, by itself, a saving or a pricing recommendation.

Contact

Tell us what you need to understand.

Start with your business, the reports you use today and what you would like to improve. We agree the next useful step and its scope before work begins. No financial files are needed for this first conversation.

Discuss your reporting needsalvaro@marginarchitecturegroup.com