Quality Management
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无铅锡炉
Longjoin is lead-free
操作员在听力室做听力测试
Operator doing hearing test in hearing chamber.
操作员用AOI设备上检查PCBA
Operator inspecting PCBA with AOI.


Quality Control Methodology

Longjoin make use of a number of quality control tools to ensure the incoming materials, process and finished goods in good quality. They are namely,

FAI
Online Self-checking
Major Inspection
IPQC
End Item Inspection
Final Inspection
Traveler and Labeling


FAI (First Article Inspection)

  • First articles of every shift or whenever operators change takes place
  • To avoid whole lot failure
  • Find out problems at the earliest stage
  • Triple inspection
    operation's self-checking
    Line foreman's checking
    Inspector's inspection


Online Self-checking

  • Operators check their own our works from time to time during productions
  • Find out problems at the earliest stage
  • Help operators better understand the standards


Major Inspection

  • For some major inspection items, 100% full check will be applied
  • Major inspection items - potential failures causing impact to safety, function and assembly structure
  • Dedicated inspectors or fixtures would be used


IPQC (In-Process Quality Control)

  • In production random check
  • To find out problems caused by operators, machines, tools and process
  • Indentify problems at the operation level


End Item Inspection

  • Essential for parts made by moldings and fixtures
  • Inspecting the last item of the mass production
  • To ensure moldings and fixtures in good conditions after a run
  • Done collaboratively by operators and inspectors


Final Inspection

  • The final keeper – preventing NG from going out
  • Completion of batch of F/G
  • Sampling or full check


Traveler and Labeling

  • Traveler to keep track of the operator, inspector, date, shift, serial number, etc.
  • Various labels, categorized in different colours, to identify materials, sub-aseemblies and goods in different stages


Quality Certifications and Continuous Improvement at a Glance

  • ISO9001:2008
    Acquired ISO9001:2008, Longjoin operates fully following ISO9001 system
  • UL, CE, 3C
    Have successfully passed UL, CE and 3C audits and qualified as UL, CE and 3C products maker
  • IPC-A-610
    Inspection standard used is based on customer requirements and following IPC-A-610
  • RoHS Implementation and Control
    RoHS implemented in the areas of incoming materials control, production process, facility, test and inspection
  • PDCA
    P (Plan) – planning based on customer requirement
    D (Do) – do the work per the plan
    C (Check) – check the goods and process per the plan
    A (Act) – analyze and continuous improve
    Use PDCA as a tool to monitor and solve quality issues
  • Quality Improvement Team
    Formed to push for continous quality improvment with team members – from operators to General Manager
    Statistical analysis and PDCA are useful tools