CSQP study materials
CSQP study resources

CSQP key terms

CSQP · Get comfortable with the vocabulary.

Supplier Quality Management (SQM)

The coordinated set of processes a buying organization uses to define, verify, and improve the quality of goods and services it receives from external providers across the full relationship lifecycle.

Related: Supplier Lifecycle Management, Cost of Poor Quality
Supplier Lifecycle Management

A stage-gated approach that governs a supplier from initial need identification through qualification, performance management, development, and eventual exit or obsolescence.

Related: Supplier Quality Management (SQM), Approved Supplier List
Cost of Poor Quality (COPQ)

The total cost incurred from defects, including internal scrap, rework, warranty, returns, inspection, and lost customer goodwill; used to justify supplier improvement investment.

Related: Cost of Quality, Supplier Scorecard
Cost of Quality (CoQ)

A framework splitting quality-related spending into prevention, appraisal, internal failure, and external failure categories to guide where resources should be allocated.

Related: Cost of Poor Quality (COPQ), Total Cost of Ownership
Total Cost of Ownership (TCO)

An estimate of all costs associated with a purchased item over its life, including price, freight, inspection, defects, inventory, and administrative burden, used instead of unit price alone.

Related: Cost of Quality, Supplier Selection Criteria
Supplier Code of Conduct

A documented set of expectations covering ethics, labor, environment, safety, and compliance that a buyer requires suppliers to accept and cascade to their own sub-tier sources.

Related: Supplier Qualification, Supplier Risk Assessment
Procurement-Quality Alignment

The working agreement between purchasing and quality functions on decision rights, shared metrics, and escalation paths so commercial and quality goals do not conflict.

Related: Supplier Scorecard, Supplier Relationship Management
Supplier Qualification

A structured evaluation that confirms a potential supplier has the capability, capacity, certifications, and controls needed before it is approved to receive business.

Related: Supplier Assessment Audit, Approved Supplier List
Supplier Selection Criteria

The weighted factors, such as technical capability, quality system maturity, cost, delivery, financial stability, and risk, used to compare and rank candidate suppliers.

Related: Total Cost of Ownership, Supplier Risk Assessment
Approved Supplier List (ASL)

A controlled register of suppliers authorized to receive purchase orders, typically recording approved scope, part numbers, approval status, and review dates.

Related: Supplier Qualification, Supplier Lifecycle Management
Supplier Assessment Audit

An on-site or remote evaluation of a candidate or existing supplier's quality system, processes, and records against defined requirements to verify capability.

Related: Audit Checklist, Corrective Action Request
Request for Quotation (RFQ)

A formal solicitation asking suppliers to propose pricing and technical approach for defined requirements, often including quality clauses and capability questionnaires.

Related: Supplier Selection Criteria, Statement of Work
Statement of Work (SOW)

A document defining the scope, deliverables, acceptance criteria, schedules, and responsibilities for a supplier engagement, forming part of the contractual baseline.

Related: Request for Quotation (RFQ), Quality Agreement
First Article Inspection (FAI)

A full verification of the first production units against all drawing and specification requirements, documented on a characteristic-by-characteristic report before mass production.

Related: Production Part Approval Process (PPAP), Control Plan
Production Part Approval Process (PPAP)

A standardized submission package demonstrating that a supplier's production process can consistently meet requirements, including design records, process flows, PFMEA, control plans, and measurement results.

Related: First Article Inspection (FAI), Process Failure Mode and Effects Analysis (PFMEA)
Supplier Scorecard

A periodic report that rates a supplier on agreed metrics such as quality, delivery, cost, and responsiveness, usually with color-coded thresholds and defined consequences.

Related: Key Performance Indicator (KPI), Supplier Business Review
Key Performance Indicator (KPI)

A quantifiable measure tied to a strategic objective, chosen because it signals whether supplier performance is improving, stable, or deteriorating.

Related: Supplier Scorecard, Rolling Average Yield
Parts Per Million (PPM)

A defect rate expressed as defective units per million units received, allowing comparison of suppliers with very different volumes.

Related: Rolling Average Yield, Supplier Scorecard
On-Time In-Full (OTIF)

A delivery metric counting only shipments that arrive by the promised date and in the ordered quantity, used to measure supplier logistics reliability.

Related: Supplier Scorecard, Key Performance Indicator (KPI)
Supplier Business Review

A scheduled meeting with a supplier to review scorecard results, agree improvement actions, and align on future business, quality, and capacity expectations.

Related: Supplier Scorecard, Corrective Action Request
Corrective Action Request (CAR)

A formal request requiring a supplier to contain a problem, find its root cause, and implement verified actions that prevent recurrence, with documented closure evidence.

Related: Root Cause Analysis, 8D Problem Solving
8D Problem Solving

An eight-discipline team method moving from containment through root cause, corrective action, validation, and prevention, commonly required for significant supplier nonconformances.

Related: Corrective Action Request, Root Cause Analysis
Root Cause Analysis

A structured investigation to identify the underlying process or system conditions that allowed a defect to occur, rather than the immediate symptom or operator error.

Related: 5 Whys, Fishbone Diagram
Supplier Development

Planned activities such as training, coaching, kaizen events, and capability building that raise a supplier's performance rather than simply enforcing requirements through inspection.

Related: Supplier Scorecard, Corrective Action Request
Continuous Improvement

An ongoing effort to reduce waste and variation through small, sustained changes, supported by measurement and standard work, applied jointly with suppliers.

Related: Supplier Development, Statistical Process Control (SPC)
Supplier Risk Assessment

A structured evaluation of the likelihood and impact of supplier failure across financial, operational, quality, geographic, and compliance dimensions, used to prioritize mitigation.

Related: Business Continuity Plan, Single Source Risk
Single Source Risk

The exposure created when a purchased item is available from only one qualified supplier or site, so any disruption directly threatens the buyer's operations.

Related: Supplier Risk Assessment, Dual Sourcing
Dual Sourcing

Deliberately qualifying two or more independent suppliers for the same item to reduce supply interruption exposure, balanced against volume and cost penalties.

Related: Single Source Risk, Approved Supplier List
Business Continuity Plan

A supplier's documented arrangements for maintaining or restoring delivery after disruption, including alternate sites, inventory buffers, and recovery time objectives.

Related: Supplier Risk Assessment, Sub-Tier Supplier
Sub-Tier Supplier

A supplier's own supplier, whose performance and risk affect the final product even though the buyer has no direct contract with it.

Related: Business Continuity Plan, Supplier Code of Conduct
Quality Management System (QMS)

The documented structure of processes, responsibilities, and records an organization uses to consistently meet customer and regulatory requirements and improve over time.

Related: ISO 9001, Management Review
ISO 9001

An internationally recognized standard specifying requirements for a quality management system, emphasizing process approach, risk-based thinking, and customer focus.

Related: Quality Management System (QMS), Certification Body
Certification Body

An independent organization that audits a supplier's management system against a published standard and issues a certificate with defined scope and validity.

Related: ISO 9001, Supplier Assessment Audit
Nonconformance

A documented failure of a product, process, or system to meet a specified requirement, which must be contained, dispositioned, and investigated.

Related: Corrective Action Request, Material Review Board
Material Review Board (MRB)

A designated group authorized to decide the disposition of nonconforming material, such as rework, repair, use-as-is, return, or scrap.

Related: Nonconformance, Corrective Action Request
Control Plan

A document listing the process steps, product characteristics, monitoring methods, sample sizes, frequencies, and reaction plans used to keep a process in control.

Related: Process Failure Mode and Effects Analysis (PFMEA), Statistical Process Control (SPC)
Process Failure Mode and Effects Analysis (PFMEA)

A team-based risk technique that scores potential process failure modes by severity, occurrence, and detection to prioritize preventive actions before defects occur.

Related: Control Plan, Risk Priority Number (RPN)
Risk Priority Number (RPN)

A score calculated by multiplying severity, occurrence, and detection ratings in an FMEA, used to rank failure modes for action, though action thresholds should also consider severity alone.

Related: Process Failure Mode and Effects Analysis (PFMEA), Root Cause Analysis
Statistical Process Control (SPC)

The use of control charts and process capability studies to distinguish normal variation from special-cause signals so corrective action can be triggered early.

Related: Control Plan, Continuous Improvement
Measurement System Analysis (MSA)

A study of the variation contributed by the measurement system itself, such as gauge repeatability and reproducibility, to confirm inspection data can be trusted.

Related: Statistical Process Control (SPC), First Article Inspection (FAI)
5 Whys

A simple technique of repeatedly asking why a problem occurred until the underlying systemic cause is reached, rather than stopping at the first plausible explanation.

Related: Root Cause Analysis, Fishbone Diagram
Fishbone Diagram

A cause-and-effect diagram that organizes potential causes of a problem into categories such as people, machine, method, material, measurement, and environment.

Related: 5 Whys, Root Cause Analysis
Quality Agreement

A contract annex that defines each party's quality responsibilities, acceptance criteria, change notification duties, audit rights, and complaint handling expectations.

Related: Statement of Work, Supplier Relationship Management
Supplier Relationship Management (SRM)

The practice of segmenting suppliers by strategic importance and managing each relationship with appropriate governance, communication, and joint planning.

Related: Supplier Business Review, Quality Agreement
Escalation Path

A predefined sequence of contacts and authority levels used to raise an unresolved supplier issue to higher management within agreed timeframes.

Related: Corrective Action Request, Supplier Business Review
Change Notification

A supplier's obligation to inform the buyer before altering process, material, sub-tier source, or site, so the buyer can assess and approve the impact.

Related: Quality Agreement, Production Part Approval Process (PPAP)