Corrective Action Plan
Meaning ~ A corrective action plan is a documented operational instrument that outlines remediation steps and verification terms to resolve systemic manufacturing defects.
Tight Sampling Plan
Meaning
Statistical lot inspection protocols increase sample sizes and lower acceptance thresholds when process quality demonstrates increased risk or recent historical defect occurrences. A tight sampling plan applies stringent verification rules to incoming shipments or ongoing production runs to catch non-conforming items before assembly. Strict inspection rules remain active until supplier quality proves consistently stable.
Inspection Escalation
Switching rules under standard frameworks like ISO 2859-1 mandate shifting from normal inspection to a tight sampling plan after consecutive lot rejections occur. Sampling larger quantities per lot reduces consumer risk by lowering the probability of accepting defective material batches into inventory. Heightened scrutiny continues until five consecutive lots pass detailed inspection.
Acceptance Criteria
Critical acceptance numbers drop significantly under intensified inspection levels, allowing fewer non-conforming units per sample batch before triggering total lot rejection. Higher sample sizes demand increased laboratory time and inspection resources, raising operational costs for both buyers and suppliers during elevated risk periods. Stringent standards protect manufacturing lines from defective raw material ingress.
Cost Impact
Extended inspection timelines slow inventory throughput at receiving docks, creating logistical bottlenecks during peak production periods. Failing an escalated inspection triggers immediate lot quarantine, vendor return authorizations, and financial chargebacks for sorting expenses.