How does the MCAA / NECA labor inefficiency factor work?

The Mechanical Contractors Association of America (MCAA) and National Electrical Contractors Association (NECA) establish standardized percentage disruption factors for trade stacking, out-of-sequence work, and congested workspaces to substantiate labor loss claims in change order proposals.

Does this tool generate AIA Document G701-style change orders?

Yes, it compiles direct labor, burdened hourly rates, equipment, materials, trade stacking markup, general conditions overhead, and statutory retainage into a standardized change order printable document ready for architect and general contractor review.

Subcontractor Estimator Suite • MCAA / NECA Inefficiency Standard

Subcontractor Change Order & Disruption Calculator

Recover Uncompensated Trade Stacking, Crew Inefficiency & Extended Field Overhead (AIA G701S / AGC Standard)

Free Excel Model

Project & Contract Metadata

Subcontractor Entity:

General Contractor:

Project Name & Metro:

CSI Trade Division:

Section 1: Impacted Crew & Burdened Wage Multiplier

Base Journeyman $/hr:

Statutory Burden %:

Crew Size Impacted:

Disrupted Crew Hours:

Fully Burdened Hourly Labor Rate: $63.60 / hr

Section 2: MCAA Bulletin 58 Inefficiency Multipliers Total Factor: 25.0% Loss

Select all conditions enforced by General Contractor out-of-sequence scheduling or trade congestion:

Trade Stacking & Area Crowding Multiple trades crammed into identical floor grid; loss of movement clearance

+10.0%

Out-of-Sequence Working Pacing Forced to install before preceding framing/ducting is finished; stop-and-start

+10.0%

Dilution of Supervision Foremen diverted to uncoordinated meetings, RFIs, and layout dispute mitigation

+5.0%

Overtime Crew Fatigue (>50 hrs/wk) Compounding physical fatigue and diminished production rate over extended schedule

+10.0%

Section 3: Extended Jobsite Overhead & Materials

Delay Calendar Days:

Daily Field Overhead ($/day):

Direct Material Costs ($):

Defensible Claim Summary

$18,485.40

AIA G701S Subcontractor Change Order Request

Inefficiency Lost Hours: 120.0 hrs

Direct Labor Disruption: $7,632.00

Extended Field Overhead (12d): $5,400.00

Added Materials & Equipment: $3,250.00

Sub Overhead & Profit (15%): $2,203.40

Legal Grounding: AIA A401 § 8.3

Factor Method: MCAA Bulletin No. 58

Official AIA Document G701S™ Format

Subcontract Change Order Proposal (TV-FORM-CO2026)

Apex Commercial Systems LLC

Specialty Commercial Subcontractor • License # ROC-391048-A

CHANGE ORDER REQUEST #01

Date: October 4, 2026

Form: AIA G701S / AGC Standard

TO GENERAL CONTRACTOR:

Apex Commercial Builders LLC

Attn: Project Manager / Estimating Dept

PROJECT & LOCATION:

Metropolitan Commercial Center Phase II

Division 26 - Electrical

Scope Description & Equitable Schedule/Cost Adjustment

Subcontractor hereby submits formal Change Order Request for equitable financial and schedule adjustment arising from unforeseen project pacing delays, trade stacking, and out-of-sequence work directives impacting contract execution:

• Labor Inefficiency Disruption (MCAA Factor Standard): Cumulative loss of labor efficiency caused by concurrent trade stacking and workspace crowding across active work zones. Total impacted crew hours: 120.0 hours.

• Extended Jobsite General Conditions: Compensable jobsite superintendent presence, dedicated equipment standby, and temporary facilities for 12 calendar days of project extension.

• Additional Direct Materials & Minor Work Alterations: Furnishing of supplemental assemblies and hardware required to bypass site obstructions.

Cost Breakdown Component	Basis / Methodology	Amount ($)
Direct Labor Disruption Recovery	Burdened trade crew rate × MCAA Inefficiency factor	$7,632.00
Extended Field Overhead	Superintendent, trailer & equipment standby per day	$5,400.00
Direct Material Alterations	Invoiced materials & fabrication hardware	$3,250.00
Subcontractor Overhead & Profit (15%)	Contractual markup on direct costs	$2,203.40
TOTAL CHANGE ORDER REQUEST (NET CONTRACT SUM INCREASE)		$18,485.40

Contract Time Adjustment: The Subcontract Completion Date is adjusted by: +12 Calendar Days

SUBMITTED BY SUBCONTRACTOR:

Michael R. Vance, Chief Estimator

Authorized Officer Date: Oct 4, 2026

ACCEPTED BY GENERAL CONTRACTOR:

(Authorized Signature & Title)

Print Name: _____________________ Date: ____________