AI-Assisted Quality Engineering · Lean Six Sigma · Continuous Improvement

FROM
PROBLEM
TO CLOSED.

Closed Loop Consulting LLC helps manufacturers find what is really driving their defects, scrap, and audit risk, then close it out for good. Behind that work sit more than 30 years of hands-on experience in plants where a missed problem becomes a recall, not just a rework ticket.

$200M+
Combined Financial Impact Across Strategic Initiatives
30+
Years Combined in Manufacturing Quality & Operations Leadership
SPC
Power BI Dashboards · Minitab Analysis · Data-Driven Quality
Lean Six Sigma Black BeltGD&TValue Stream MappingDMAIC PPAP / APQPPower BIAI-Assisted WorkflowsRoot Cause Analysis IATF 16949AS9100 Rev DISO 9001Hoshin-Kanri SPC / MinitabCMM / GD&TOEE ImprovementCNC Programming Lean Six Sigma Black BeltGD&TValue Stream MappingDMAIC PPAP / APQPPower BIAI-Assisted WorkflowsRoot Cause Analysis IATF 16949AS9100 Rev DISO 9001Hoshin-Kanri SPC / MinitabCMM / GD&TOEE ImprovementCNC Programming
🔄
Full-Cycle Expertise
One engagement, two vantage points: the engineering detail and the executive view, from a first-part inspection all the way to plant-wide change.
📊
Data-Driven Quality
Power BI dashboards, Minitab analysis, and SPC systems that turn raw shop-floor numbers into decisions a leader can act on.
🌐
Global Operations Depth
Multi-site P&L leadership in North America, Latin America, Europe, China, Mexico, Brazil, and India.
🎓
Teach What We Do
We have taught engineering at SIU, the College of DuPage, and TMA. Your team should finish a project knowing how to hold the gains, not just holding a binder.

What We Do

INTEGRATED EXPERTISE
ACROSS YOUR OPERATION

Closed Loop covers both sides of the problem: the quality engineering that proves a process is sound, and the operations discipline that makes the fix hold on the floor. Standards, measurement, and the statistics behind a capable process run through every engagement, from the first measurement to the final sign-off.

⚙️
Quality Management Systems

We design, build, and certify QMS that stand up to the toughest customer and regulatory standards in aerospace, automotive, and industrial manufacturing.

  • ISO 9001 / AS9100 Rev D / IATF 16949 / TL9000
  • ISO 14001 / ISO 45001 Compliance
  • PPAP / APQP / FMEA / Control Plans
  • GD&T Application & Blueprint Interpretation
  • CMM Programming & Measurement Systems Analysis
  • Supplier Quality Manual Development
  • Internal Audit Programs & Zero Non-Conformance
📊
Lean Six Sigma & CI

Real, lasting gains through DMAIC, Value Stream Mapping, and Kaizen events, run by certified Black Belts with a track record of multi-million dollar results.

  • DMAIC / Lean Six Sigma Black Belt Projects
  • Value Stream Mapping (VSM) & Kaizen Events
  • Hoshin-Kanri / X-Matrix Policy Deployment
  • SPC, Process Capability & Minitab Analysis
  • OEE Improvement & Throughput Optimization
  • 1-Piece Flow, Kanban & Pull System Design
  • Demand Flow Technology Implementation
🏭
Operations Excellence

Senior operations leadership in production, supply chain, and team design. The gains are measured in real cost and efficiency, and they hold long after we leave.

  • Multi-Site Operations Assessment & Roadmapping
  • P&L Restructuring & Cost Reduction Programs
  • Global Supply Chain & Sourcing Optimization
  • Warehouse / Inbound Logistics Transformation
  • Talent Development & Progression Modeling
  • M&A Integration & Plant Consolidation
  • Interim Quality & Operations Support
📊Power BI · Minitab · SPC · Data-Driven Quality

TOOLS THAT MAKE
QUALITY VISIBLE

Good decisions start with good data. We build the dashboards, models, and trackers that turn raw process data into something your team can act on, and we build them on the platforms you already own.

Power BI dashboards, Minitab capability studies, SPC control systems: each one helps you see variation, catch a problem early, and prove the fix with numbers. We now lean on generative AI tools to get there faster.

📈
Power BI Quality Dashboards
KPI dashboards, supplier scorecards, cost-of-quality tracking, and defect trends, all built in Power BI. Your teams get the picture in real time instead of at month end.
📐
Minitab & Statistical Analysis
Process capability studies (Cp/Cpk), gage R&R, hypothesis testing, and DOE. The statistics back up your root cause work and confirm that a fix actually held.
📋
SPC & Control Systems
Control chart design, control plans, and SPC rollout that keep a process inside its limits and flag drift before it turns into a defect.
🔧
GD&T, CNC & CMM Support
GD&T application and blueprint interpretation, CNC process knowledge, and CMM measurement support, so design intent and what the shop floor actually makes line up.
🤖
AI-Assisted Quality Workflows
We use generative AI in our own daily work: drafting procedures and work instructions, speeding up analysis and reporting, and structuring CAPA and audit files. We bring that same faster way of working to your projects, and we can show your team how to use it responsibly.

Our Process

THE CLOSED LOOP
METHODOLOGY

Every engagement runs through the same four phases, from finding the true root cause to confirming the fix still holds months later. Nothing is left open.

01
Assess

On-site gap review, process mapping, data collection, and a baseline measurement. We watch the line as it actually runs, not as the SOP says it should.

02
Analyze

Root cause work using DMAIC, Fishbone, 5-Why, FMEA, SPC, GD&T review, and Minitab. Conclusions come from the data, not from assumptions.

03
Implement

We put the fix in place with your teams: control plans, standard work, digital tools, and the change management that makes operators own it. Built to last.

04
Verify

We measure again, confirm process capability, and check audit readiness. The loop is not closed until the numbers prove it, and the auditors agree.

ISO 9001:2015
AS9100 Rev D
IATF 16949
VDA 6.3
ISO 14001
ISO 45001
TL9000
Six Sigma Black Belt
Hoshin-Kanri
PPAP / APQP
FMEA / Control Plans
GD&T / Blueprint Reading
CMM Programming
SPC / Minitab
VSM / Kaizen
OEE Systems
Power BI / SAP
Power BI
Generative AI Tools
CNC Process Knowledge

Industries Served

BUILT FOR
HIGH-STAKES MANUFACTURING

Both principals have held senior roles inside the industries we serve. We know your standards, your customers, and your cost pressures because we have worked under them.

✈️
Aerospace & Defense

AS9100 Rev D, FAA compliance, first article inspection, GD&T interpretation, and precision manufacturing QMS design.

🚗
Automotive

IATF 16949, VDA 6.3, PPAP, APQP, OEE improvement, and Tier 1 / Tier 2 supplier quality development including PPM reduction to near-zero.

Electronics & EV

High-power connector quality, EV supply chain containment, defect reduction programs, and electro-mechanical assembly quality systems.

📡
Telecommunications & Wireless

TL9000 compliance, zero-defect programs for Verizon, US Cellular, and wireless infrastructure manufacturers across metal fabrication and composite manufacturing.

🔧
Industrial & HVAC

ISO 9001 implementation, warehouse operations, inbound logistics quality, compressor and refrigeration assembly CI programs.

🌎
Global / Multi-Site Operations

Multi-site management in North America, Latin America, Europe, China, Mexico, Brazil, and India, covering P&L, plant consolidation, and M&A integration.

The Principal

PRACTITIONER FIRST.
CONSULTANT SECOND.

Closed Loop Consulting is led by a quality engineering specialist who has spent her career inside the same plants and functions she now advises, covering both the engineering discipline and the operations rigor a fix needs to hold.

PP
Patrycja Pezan, MSE
Principal Quality Specialist
M.S. Quality Engineering Management, SIU · B.S. Industrial Management & Applied Engineering, SIU

Patrycja has spent more than 15 years in quality engineering across aerospace, automotive, and electronics. Her hands-on work covers QMS implementation, supplier development, Six Sigma projects, and process capability at scale. Her career spans Fortune 500 manufacturers in aerospace, automotive, and electronics, where she has supported quality and operations programs from the shop floor through executive review. She builds dashboards in Power BI, runs the statistics in Minitab and SPC, and uses GD&T and CMM knowledge to take precision clients from blueprint review through measurement sign-off. She also leans on generative AI tools to speed up documentation and analysis, which brings a modern edge to traditional engineering. She holds a B.S. in Industrial Management & Applied Engineering and an M.S. in Quality Engineering Management, both from SIU.

Power BIMinitab / SPCAI-Assisted Workflows Six SigmaAS9100 IATF 16949ISO 9001/14001 VDA 6.3PPAP / APQP GD&TCMM SAPM.S. Quality Eng. (SIU)

By the Numbers

RESULTS THAT
SPEAK IN DOLLARS

A selection of results from the quality and operations programs behind Closed Loop Consulting. The same methods and discipline go into every client engagement.

$200M+
Strategic Business Impact Over 20+ Years
$300M
Revenue Under Direct Operations P&L Responsibility
99%
PPM Improvement (872 → 13) Automotive Tier 1
$20M
Per-Facility Savings via M&A Integration
80%
Overtime Reduction via 4-Shift Model
1.67
Cpk Achieved, General Motors Line (from 1.0)
0
External Audit Non-Conformances Sustained YoY
100%
Throughput Increase via 1-Piece Flow & Pull System

Case Studies

THE LOOP
CLOSED.

A few representative engagements, spanning quality engineering, operations, and AI-assisted continuous improvement.

Electronics / EV Connectors
High-Power EV Connector Defect Reduction, Tier 1 Manufacturer

End-to-end containment-to-closure quality program for a high-power EV connector product line. DMAIC root cause analysis, GD&T-informed dimensional review, process capability improvement, and supplier corrective action across the supply chain.

67%
Defect Reduction
1.67
Cpk Achieved
Automotive / Tier 1 · BorgWarner
PPM Reduction & OEE Transformation, Transmission Technologies

Comprehensive quality and operations improvement across metal fabrication, clutch assembly, and packaging automation. Implemented automatic inspection equipment, Bluetooth wireless gage data collection, 4-shift operator model, and IATF 16949 certification.

99%
PPM Improvement (872→13)
.83
OEE (from .33)
Telecom / Wireless · Amphenol
Multi-Site Lean CI Program, 5 Wireless Infrastructure Plants

Led process improvements across 5 manufacturing sites. Reduced lead time 50%, eliminated all customer rejects at fiber pedestal line, reduced unit cost 25% via Design for Manufacturing, and delivered $1.5M annualized savings through Hoshin-Kanri policy deployment.

$1.5M
Annualized Savings
50%
Lead Time Reduction
Industrial / Global Supply Chain · Ingersoll Rand
M&A Integration & Supply Chain Transformation

Plant consolidation of three manufacturing businesses across CA, CO, and NJ. Delivered $20M per facility in cost reductions, $2.6M inventory reduction, doubled inventory turns, and 66% supplier DPM reduction at program inception.

$20M
Per-Facility Savings
Inventory Turns

Insights & Answers

FROM THE
PLANT FLOOR

Straight answers to the questions manufacturers actually ask us about audits, corrective action, certification, and the cost of getting it wrong. Written from experience, not theory.

View all articles →

Get Started

START WITH A
FREE ASSESSMENT

Every engagement starts with a no-cost assessment. We pinpoint where you stand to gain the most, whether that is on the quality side, the operations side, or in how you use technology, before you commit to anything.

📍
Headquarters
Saint Charles, Illinois · Serving clients nationally & globally
✉️
Email
patrycjapezan@closedloopconsulting.net
🏭
Primary Markets
Aerospace · Automotive · Electronics · Telecom · Industrial
📊
Tools We Build
Power BI Dashboards · Minitab Analysis · SPC · Control Plans
📋
Engagement Types
Project-based · Retainer · Interim Executive Leadership