The Assembly
Line Test.
How I decide which construction trades I can actually help — and which ones I'm honest enough to turn down. The answer comes down to one question.
Does the Work Repeat in a Predictable Unit?
I spent years managing commercial construction before moving into financial advisory. I've seen 50+ subcontractor financials every month for years. The pattern is consistent: the contractors who can see a problem in week two instead of at closeout are the ones whose work produces a measurable unit every day. The ones who find out at closeout are the ones whose work is too complex to track that way.
That observation became the framework. I call it the assembly line test. Not because construction is a factory — it isn't — but because the financial visibility that actually helps a subcontractor requires work that produces a trackable unit, just like an assembly line produces a trackable unit at every station.
Commercial Subcontractors — Dirt to Dried-In
Civil Contractors
Unit: linear feet of pipe, CY of excavation. Cost codes by unit price type and depth. Production variance visible weekly.
Concrete Contractors
Unit: cubic yards placed per pour. Cost codes by pour sequence — formwork, rebar, pump, placement, finishing.
Concrete Flatwork
Unit: SF placed per pour. Simpler than structural concrete. Clean unit-price job costing.
Electrical (Commercial New)
Unit: by phase — underground, in-slab, rough-in by floor, wire pull, trim. Commercial new construction only. Remodel fails the test.
SWPPP / Erosion Control
Unit: BMP type and site. Cost per site tracked across the portfolio. Highly repeatable.
Underground Utility
Unit: linear feet by pipe type and depth. Nearly identical to civil job costing structure.
Sitework
Unit: phase-based — clearing, grading, utilities, paving. Same phase structure repeats across projects.
Grading
Unit: cubic yards of cut and fill. Production tracked against grade design quantities. Cut-fill variance visible mid-job.
Masonry
Unit: units per mason-hour by wall type and floor. CMU block, face brick, stone — each tracked separately.
Framing
Unit: SF or board feet by floor. Floor-by-floor cost codes. Labor cost per SF visible weekly.
Drywall
Unit: SF by board type and floor. Floor-by-floor phase structure. Clean and repeatable.
Insulation
Unit: SF by type and R-value. One of the cleanest assembly line trades — highly consistent unit cost.
Excavation
Unit: CY by soil type and depth. Equipment-heavy. Nearly identical to civil and grading.
Demolition
Unit: phase by structure type. Equipment-heavy. Mobilization-intensive. Clean phase structure.
Paving
Unit: tons placed, compaction passes, linear feet of striping. Very civil-like unit price structure.
Structural Steel
Unit: connections per crew per day, tons erected. Equipment-heavy. Piece-count tracking is reliable.
Waterproofing
Unit: SF by membrane type and substrate. Highly repeatable. One of the cleanest envelope trades.
EIFS / Stucco
Unit: SF by substrate type. Floor-by-floor on multi-story work. Clean unit-price structure.
Why I Turn Down Certain Trades
Mechanical Contractors
The phase matrix for a commercial HVAC project — design, procurement by equipment category, multiple labor classifications, multiple inspection phases, startup and commissioning — creates dozens of cost code combinations. Setup takes longer than the engagement produces in value. The unit-price comparison breaks down because the units aren't consistent across projects.
Plumbing Contractors
Same problem as mechanical. Underground, above-slab rough-in, trim-out, and service work all have different cost structures. Service work specifically — per-call cost allocation, callback tracking, dispatcher overhead — adds a layer of complexity that requires a different system than assembly line job costing.
Fire Protection
Design, procurement of specialty suppression equipment, rough-in, trim-out, AHJ inspection, and commissioning — each phase has different cost drivers, different lead times, and different billing events. The assembly line breaks down at design and specialty procurement.
Electrical Remodel / TI Work
Commercial new construction electrical passes — floor by floor, phase by phase. Remodel and tenant improvement work fails — the phase matrix varies by building type, existing conditions, and owner requirements in ways that make consistent unit-cost tracking impractical. I vet electrical clients to commercial new construction only.
Why Turning Trades Down Makes Me Better at Serving the Ones I Take
A fractional CFO who takes every trade builds a generic system. The civil contractor gets the same ControlQore setup as the mechanical contractor — which means neither gets a system built for how they actually estimate and produce work. Specialization means the civil contractor's cost codes match their unit price categories, the masonry contractor's cost codes match their wall types, and the framing contractor's cost codes match their floor-by-floor estimate. That specificity is only possible when the trade passes the assembly line test.
