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First / Patrol / Final Inspection

First / Patrol / Final Inspection · Digitized Three-Check

Completely break the shop-floor habit of "mass-producing while the first article fails." Production starts only after the first article passes, patrol-inspection failures auto-stop the line, and final-inspection data binds to shipping orders; inspection items are configurable, results leave an audit trail, and defective items are traceable — the three-check system truly lands on the floor.

3
Inspection Types (First / Patrol / Final)
0
Paper Inspection Records
1
Second-Level Auto Line Stop
Capabilities

Core Capabilities of the Three-Check System

From the first article at start-up to final inspection at line-off, every inspection action has a digital closed loop

🥇 First Article Inspection (FAI)

After every start-up / changeover / material change, a first article is mandatory; mass production proceeds only when OK, while NG auto-blocks the start button

🔁 Patrol Inspection (IPQC)

Patrol reminders by time or count frequency, with inspection tasks pushed to the PDA; overdue tasks auto-alert the supervisor

Final Inspection (OQC)

Sampling before line-off, with the sample size auto-calculated per the AQL sampling plan, and results bound to the shipping order

📑 Configurable Inspection Items

Appearance, dimension, performance and reliability item categories, with three data types: variable / attribute / option

🚨 NG Auto Line Stop

A patrol NG triggers a line-stop signal and pushes an Andon call; production cannot continue until it's handled

📷 Image / Value Audit Trail

Take photos during inspection and read values directly from gauges, avoiding manual transcription errors, with traceable results

mes.shangbangke.com/qc/first-articleFAI judge
QC
First Article — WO-2041
NGPass & release
OD Ø50±0.05
50.02 mm
Concentricity ≤0.02
0.015 mm
Li
Pass · start allowed

First Article Inspection: The Last Gate Before Start-Up

"Keep running even though the first article fails" is a common shop-floor hazard — often it means a whole batch of scrap. The system enforces it: until the first article is submitted and IPQC judges it OK, the "Start" button on the worker's PDA is unavailable, eliminating this risk by design.

  • First-article inspection task auto-issued with the operation card
  • Before mass production, IPQC must judge the first article OK in the system
  • An NG first article auto-triggers SOP re-review + process-engineer involvement
  • First-article sample photos + key dimension data archived for reference
mes.shangbangke.com/qc/patrolPatrol tasks
QC
Patrol Task List
FrequencyStart patrol
StationFreqPlannedStatus
CNC-01Every 2h10:00Done
INJ-02Per 100 pcs10:30Pending
WLD-01Every 2h09:00Overdue
ASM-01Every 4h12:00Not due

Patrol Inspection: Auto-Pushed by Frequency, Overdue Alerts

The biggest problem with patrol inspection is "forgot today," "too busy tomorrow." The system proactively pushes patrol tasks to IPQC at the frequency the process requires (every 2 hours / every 100 pieces); overdue tasks auto-alert the supervisor, ensuring no patrol is missed.

  • By time frequency: an automatic reminder every 2 hours
  • By count frequency: triggers a sampling check every 100 pieces
  • 30 minutes overdue: pushes a supervisor alert
  • Patrol NG auto-stops the line + triggers the defect workflow
mes.shangbangke.com/qc/finalAQL sampling
QC
Final OQC — WO-2041 Lot
Re-inspectAccept
GB/T 2828.1 II
1200 pcs
80 pcs
2 / 3
1 pc
Accept · bound to shipment

Final Inspection: Sample by AQL, Bind to the Shipping Order

Final inspection isn't just a pass/fail judgment — it samples per the customer's AQL (acceptable quality limit) plan. The system auto-calculates the sample size and acceptance limits per the customer's standard; after OQC enters data, it auto-judges pass / fail / re-inspect.

  • GB/T 2828.1 / ISO 2859 standard sampling plans built in
  • AC / RE numbers auto-calculated, with OQC only entering data
  • Failed batches can be released / tightened / 100%-inspected
  • Final-inspection report bound to the shipping order, viewable online by the customer
Use Cases

Three-Check in Action Across Different Processes

Auto-Parts Stamping First-Article Sampling

A first article + retained sample is mandatory at every die start / die change; an NG first article auto-locks the batch for later traceability

SMT Placement X-Ray Sampling

5 boards sampled for X-Ray every hour, with solder-joint defect data fed back to SPC to prevent batch cold joints

Injection-Molded Appearance 100% Inspection

High appearance requirements mean 100% visual inspection after line-off + AI vision assistance, with defect codes auto-classified

Food GMP Patrol

Scheduled patrol of temperature/humidity, pH and cleanliness per HACCP critical control points, with records archived for reference

Related Features

How Three-Check Connects with These Capabilities

Inspection data drives SPC, the defect workflow and quality traceability

Try Digitized Three-Check Today

Sign up to explore the full first / patrol / final inspection workflow for free, or book a consultant demo