FAT, SAT, and Line Acceptance

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A construction project ends when the certificate of occupancy is issued. A manufacturing line implementation ends when the line runs at rated speed on real product and the owner signs off. Between those two events sits a sequence of testing, commissioning, and acceptance milestones that most construction estimators have never priced. This page covers that sequence, who owns each phase, what it costs, and where the contract risk lives.

The Handover Sequence

Every manufacturing line implementation passes through these phases in order. Missing or underpricing any of them is a common source of schedule overruns and disputed extras.

Step	Name	Who Leads	Typical Duration	Notes
1	Mechanical Completion	GC/DB contractor	—	All equipment installed, utility hookups complete, no more construction work in the area
2	Loop Checkout	Controls integrator + GC	1–3 weeks	Every instrument, valve, and actuator verified for correct wiring and signal; no product running
3	Factory Acceptance Testing (FAT)	Equipment vendor	1–5 days per machine	Happens at the vendor’s factory before shipment — not after installation. Timing: during fabrication
4	Functional Testing	Controls integrator	1–2 weeks	Sequences and interlocks tested with dry-runs; no product
5	Site Acceptance Testing (SAT)	Controls integrator + vendor crews	2 days – 6 weeks (by complexity)	Line runs with real product or approved substitute; acceptance criteria applied
6	Production Trial	Owner operations + GC/DB	1–5 days of production	Sustained run at rated OEE; defines final acceptance
7	Punch List Resolution	GC	2–4 weeks concurrent	Open items from SAT resolved; no production impact
8	Acceptance / Handover	Owner	—	Owner signs substantial completion or final acceptance; GC warranty period begins

Key timing fact: FAT happens at the vendor’s facility during fabrication — typically 4–12 weeks before the equipment ships. It is a procurement milestone, not a construction milestone. Budget for it when you schedule vendor payments, not when you schedule construction.

Factory Acceptance Testing (FAT)

FAT is a witnessed test of the equipment at the manufacturer’s factory before it ships to the job site. The goal is to find problems while the vendor’s engineering team is still around and the equipment is still accessible on their floor — not after it’s been installed in your building.

What Gets Tested at FAT

Mechanical completeness: all components present, correctly assembled
Controls: PLC program loaded, HMI functional, alarms and interlocks verified
Performance: machine runs at rated speed on water, dry product, or approved surrogate
Safety: guards, e-stops, light curtains, interlocks verified
Documentation: O&M manuals, spare parts list, FAT protocol sign-off

FAT Cost Structure

Cost Item	Typical Range	Notes
GC/owner witness travel (airfare + hotel)	$1,500–$5,000 per person per trip	Budget 2–3 witnesses for complex equipment; 1 for simple
Per diem and time	$800–$2,000/day per person	Multi-day FATs are common for filling lines, packaging systems
Test media at vendor facility	$500–$5,000	Water runs are free; product-specific surrogates cost more
Vendor rework during FAT	$5,000–$50,000+	If deficiencies are found; cost allocation depends on contract
Re-travel if FAT fails and re-test is required	$3,000–$10,000 per round trip	Document who pays for re-travel in the equipment PO
Budget per FAT event (single machine)	$5,000–$25,000	Travel-heavy for remote vendors (Europe, Asia)
Budget for a 6-machine line	$50,000–$100,000	Assumes domestic vendors; 2 witnesses per FAT

Estimator tip: FAT costs belong in the owner’s budget unless the contract assigns them to the GC. Confirm in writing before GMP. If the owner’s team isn’t available for FAT, someone has to witness it — confirm who and budget accordingly.

Site Acceptance Testing (SAT)

SAT is the formal test of the installed and commissioned line at the job site, running on real product or approved substitute. SAT confirms the line meets the performance criteria defined in the equipment purchase order and design specifications.

SAT Duration by Line Type

Line Type	Typical SAT Duration	Notes
Single standalone machine (filler, palletizer)	2–5 days	Simple acceptance criteria; one vendor crew
Basic packaging line (3–5 machines)	1–2 weeks	Multiple vendor crews; scheduling coordination required
Complex filling + packaging line (6–10 machines)	2–4 weeks	Controls integration SAT adds time beyond mechanical
Fully automated line with AGVs, MES integration	4–8 weeks	Software integration testing dominates; expect iteration
Process manufacturing line (brewing, dairy, liquid F&B)	3–6 weeks	CIP validation, process parameter verification, product quality testing

SAT Pass/Fail Criteria

SAT acceptance criteria must be defined in writing before SAT begins. The most common criteria for manufacturing lines:

Criterion	What It Means	Typical Threshold
Throughput rate	Line must sustain rated speed for a defined run duration	≥90% of nameplate rate over a 4–8 hour continuous run
OEE	Overall Equipment Effectiveness (see below)	65–80% at initial SAT; 80–85% after 30–60 day ramp
Quality conformance	Packaged product meets spec (fill weight, seal integrity, label placement)	≥98–99.5% conforming units during test run
Changeover time	Product/format changeover within defined time	Contractual; varies widely by line design
Downtime events	Maximum allowable unplanned stops during test window	Contractual; depends on line complexity

OEE — What It Is and Why It Matters for Acceptance

OEE (Overall Equipment Effectiveness) is the standard metric for manufacturing line performance. If an acceptance clause references OEE, the estimator needs to understand what it means — because OEE-based acceptance clauses are where the biggest contract disputes originate.

OEE = Availability × Performance × Quality

Factor	Definition	Example
Availability	% of scheduled time the line is actually running	90% = line is down 10% of scheduled time
Performance	Actual speed vs. rated speed while running	95% = running at 95% of nameplate rate
Quality	% of output that meets spec (first pass)	99% = 1% rejected/reworked
OEE	Availability × Performance × Quality	0.90 × 0.95 × 0.99 = 84.6%

OEE Benchmarks

OEE Level	What It Means
≥85%	World class; rarely achieved on a new line in the first months
70–85%	Good performance for an established line
50–70%	Typical OEE on a new line in the first 30–60 days
<50%	Poor; likely indicates unresolved controls or mechanical issues

Estimator tip: Equipment vendors quote OEE performance at FAT, where conditions are controlled and the machine runs on a surrogate. Real first-month OEE on a new line is typically 50–70%, even on good equipment. If a contract requires 85% OEE at SAT on Day 1 with real product, that is an unrealistic threshold and a significant risk to the GC. Push back in contract negotiations.

Who Pays for Repeat Testing

SAT failure is one of the highest-risk events on a manufacturing line implementation. The question of who pays to fix the problem and re-run SAT depends on why the failure occurred.

SAT Failure Cause	Who Typically Pays	Risk Level
Equipment defect (vendor’s design or manufacturing error)	Equipment vendor	Low — clear contractual accountability
Controls programming error (controls integrator scope)	Controls integrator	Low — clear scope; covered by integrator’s contract
Utility delivery failure (GC didn’t provide adequate steam/air/power)	GC	Medium — confirm utility specs in writing before SAT
Acceptance criteria set too high (contractual ambiguity)	Disputed — GC and owner share risk	High — most common dispute source
Owner’s product not to spec (fill weight variations, ingredient inconsistency)	Owner	Medium — owner must supply confirmed in-spec product for SAT
Integration failure between multiple vendors’ equipment	Disputed	High — controls integrator scope definition is critical
Operator error during test run	Owner	Low — if operators are not trained, SAT should not start
Simultaneous mechanical and controls defects	Shared	High — finger-pointing between vendors is common

The most expensive scenario: Acceptance criteria are ambiguous. After a failed SAT, the GC, equipment vendors, and owner all dispute who is responsible. The GC absorbs delay and extended general conditions costs while the parties negotiate. Prevent this by defining acceptance criteria with specific, measurable thresholds in the contract — before GMP signature.

Commissioning vs. Startup vs. Qualification

These three terms are used interchangeably but they mean different things. Scope disputes frequently arise when contracts don’t define which of these the GC is responsible for.

Phase	What It Is	Who Typically Owns	Cost Owner
Commissioning	Systematic testing of installed systems to verify they operate per design intent. No production.	GC / commissioning agent	GC scope or owner project cost — confirm in contract
Startup	First production runs; training operators; debugging with real product	Owner operations team + vendor support	Owner project cost; vendor startup labor is a separate line
Qualification (IQ/OQ/PQ)	Formal documented evidence that equipment meets its intended purpose. Required for pharma; optional but common for F&B with SQF/BRC certification	Owner quality team + validation consultant	Owner project cost; almost never in GMP

F&B/CPG Equivalent of Qualification

F&B does not require IQ/OQ/PQ in the pharmaceutical sense, but GFSI-certified facilities (SQF, BRC, FSSC 22000) expect documented evidence of equipment verification. The F&B analog:

Pharma Term	F&B/CPG Equivalent	Documentation Required
IQ (Installation Qualification)	Equipment installation verification	FAT report, installation checklist, utility connection confirmation
OQ (Operational Qualification)	Functional testing documentation	SAT protocol, loop checkout records, alarm verification
PQ (Performance Qualification)	Production validation	First production run data, product quality conformance records, OEE log

F&B CQV sequence (Commissioning → Qualification → Verification): Larger CPG owners specify a formal CQV acceptance ladder on equipment specs. A concrete qualification milestone seen in practice (ConAgra Green Jay packaging spec): “successful qualification of 1,000 saleable totes marks the Engineering→Operations handoff” — though full qualification (committing to scheduled demand) is usually far beyond that point, followed by a ~30-day Verification phase under Operations leadership. The full sequence and its cost/schedule tail are documented in Food and Beverage (F&B Acceptance — CQV). The estimator’s job is to flag that CQV is owner project cost but drives contractor sequencing and standby, and to catch unrealistic acceptance thresholds (see Contract Language Risk below).

Production Trial

The production trial is a sustained run of the line on real product, typically after SAT has been passed and punch list items are substantially resolved. It is the final step before acceptance.

What the production trial tests:

OEE sustained over a defined window (typically 4–24 hours)
Product quality conformance at full production rate
Changeover from one product/format to another
Operator ability to run the line without vendor support

Who furnishes product and packaging: Always the owner. The production trial is not the GC’s scope. Product cost and the risk of off-spec or waste product during the trial belong to the owner. Confirm this in writing.

Cost of product at risk during production trial:

Line Type	Product Volume at Risk	Typical Value at Risk
Simple single-product line	4–8 hours of production	$5,000–$50,000
Multi-SKU CPG packaging line	8–16 hours including changeover	$10,000–$150,000
High-value process line (beverage, dairy, premium food)	4–8 hours	$50,000–$500,000+

Handover Cost Structure

These are the cost items associated with the testing and handover phase. Most belong in the owner’s budget as Owner Project Costs (OPC), but the estimator must flag them — if the owner hasn’t budgeted them, the project is underfunded even if the GMP is correct.

Cost Item	Typical Range	Budget Owner
Commissioning manager (third-party)	$1,500–$3,500/day × 4–12 weeks	OPC
FAT witness travel (owner team)	$5,000–$100,000 for a full line	OPC
Vendor startup support labor (above equipment PO)	$5,000–$40,000 per major machine	OPC
Controls integrator SAT support	$10,000–$80,000	GC or OPC — confirm in contract
Test product and packaging materials	$5,000–$500,000	OPC (always)
Production trial waste allowance	1–5% of trial output value	OPC
Extended GC site presence during SAT (general conditions overrun)	$5,000–$30,000/week	GC risk — carry in contingency
Repeat SAT (if first attempt fails)	$10,000–$100,000+	Depends on cause — carry allowance
Punch list resolution labor	1–3% of construction scope	GC
First-fill spare parts	0.5–1.5% of equipment cost	OPC

Handover Cost as % of Equipment Value

Line Complexity	Handover Cost Range (% of equipment FOB)
Simple single machine	3–6%
Standard multi-machine packaging line	6–10%
Complex automated line with MES integration	12–20%
Process manufacturing line (CIP, thermal processing)	15–25%

Contract Language Risk

These contract phrases create the most risk for a GC or DB contractor on manufacturing line acceptance:

Risky Contract Phrase	Why It’s Risky	What to Negotiate Instead
”Line shall achieve 85% OEE at SAT”	New lines rarely achieve this; failure triggers dispute	”Line shall achieve 65–70% OEE at initial SAT; 80–85% OEE after 60-day ramp period"
"Vendor responsible for production performance”	Undefined — production performance at what point, measured how?	Define: throughput rate, OEE threshold, quality conformance rate, test duration, test conditions
”SAT complete when owner accepts”	Open-ended; owner can reject indefinitely	”SAT complete when line meets the performance criteria in Exhibit [X] for a continuous [Y]-hour run"
"Commissioning included in GMP”	Commissioning is undefined — what does this include?	Attach a commissioning scope matrix defining GC’s scope vs. owner’s scope vs. vendor’s scope
”GC warrants production performance”	GC cannot warrant production if owner operates the line	”GC warrants equipment is installed per specification; production performance warranty belongs to equipment vendors"
"No additional cost for repeat SAT”	GC absorbs all repeat testing cost regardless of cause	Itemize the repeat testing cost allocation by failure cause

Five Protections for GC on Acceptance Contracts

Define acceptance criteria with specific, measurable thresholds in writing before GMP signature.
Confirm that owner will supply in-spec product and trained operators for SAT and production trial.
Scope the controls integrator’s SAT support responsibility in writing — including who pays if SAT fails due to controls issues vs. mechanical issues.
Carry a contingency allowance for extended SAT (2–4 weeks of extended general conditions).
Document FAT results in writing. A failed FAT that was accepted without documented resolution becomes a disputed defect later.

Pharma Note — IQ/OQ/PQ vs. F&B/CPG

Factor	Pharma	F&B / CPG
Regulatory mandate	FDA 21 CFR Part 11 / Part 211; EU Annex 11	No federal mandate for validation
Documentation requirement	Full validation master plan (VMP), IQ/OQ/PQ protocols	GFSI audit expectations; HACCP-based process documentation
Computer system validation (CSV)	Required for all GMP-controlled software	Not required; recommended for SCADA/MES
Cost adder vs. standard commissioning	+30–60% of commissioning cost	+5–15% for audit-ready documentation
Timeline impact	+4–12 weeks for validation documentation and review	+1–3 weeks for GFSI audit prep

Commissioning and Startup — commissioning costs that belong in OPC
Owner Project Costs — full OPC framework; where handover costs are budgeted
Phase-by-Phase Workflow — where FAT/SAT sits in the project sequence
Scope Misses Checklist — pre-submission QC covering commissioning scope gaps
Controls and Automation Scope — controls integrator scope, which directly affects SAT duration and risk
Manufacturing Line Implementation - The Full Cost Envelope — orienting frame for manufacturing line project cost structure