- Quality management system (QMS)
- A formalized set of policies, processes, and procedures used to direct and control how an organization achieves and maintains quality.
- Quality assurance (QA)
- Proactive activities that build quality into processes to prevent defects before they occur.
- Quality control (QC)
- Reactive activities that inspect or test outputs to detect defects and prevent non-conforming products or services from reaching customers.
- Non-conformance
- Any product, service, or process output that fails to meet defined quality requirements or specifications.
- Corrective action
- A documented response to a confirmed non-conformance that identifies root cause and implements a fix to prevent recurrence.
- Acceptance criteria
- The specific, measurable conditions a product or deliverable must meet to be considered acceptable for use or delivery.
- Audit
- A systematic, independent review of quality activities and records to verify that standards are being followed and objectives are being met.
- Continuous improvement
- An ongoing effort to incrementally reduce defects, waste, and variation in processes, typically guided by performance data.
- Root cause analysis
- A structured investigation technique used to identify the underlying reason a defect or failure occurred, rather than just its symptoms.
- Quality management plan (QMP)
- The overarching document that defines a program's quality objectives, responsibilities, methods, and review schedule.
- Specification
- A precise, documented description of the required characteristics of a product, material, or process output.
- Traceability
- The ability to track a product, component, or process decision back through the production or service chain to its origin.