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Product Development Procedures

To develop high end ANC headphones, we have strict procedures to follow, all stanges have their relevant testing steps.

Please click to see details of how to develop high quality Bluetooth headphones.

1. Proposal

Feasibility Study - provide initial market evaluation and its potential


2. Project Launch 

Application for approval


3. Product Identification (ID) 

1) Initial conceptual design

2) ID Outlook design

3) Initial PCB Layout plan & estimation of dimensions

4) Requirement for battery such as dimensions, capacity and model selection

5) ID Design

6) ID Design modification 

7) Confirmation & approval of outlook design --Remarks: Production information such as CMF (color, materials & surface finishing), functional requirement, electrical parameters, OEM assessments, confirmation reports


4. Engineering Verification Test (EVT)Hand-made sample Stage 
4.1)  EVT for structure stage

4.1.1)  3D Mechanical Structure Design

4.1.2)  Assessment for structure design --Structure design assessment report 

4.1.3)  Modification for   structure design and approval

4.1.4)  Structural to provide frame drawing for PCB to electrical

4.1.5) Making of first piece of structural article

4.1.6) Review of first article of hand-made structural assembly (such   as fitness of the press-button, lock-positions, bone positions..etc.)     hand-made sample   assessment report    

4.2) EVT for Electronics, Acoustic & software

4.2.1)Principle drawing of electrical schematic graphic design, Electrical circuit drawing    

4.2.2) PCB layout   (electronics file)    

4.2.3) GERBER file   (electronics file)    

4.2.4) PCB silk screen drawing    

4.2.5) PCB LAYOUT Review Original LAYOUT documents    

4.2.6) EVT sample's  material preparation (4 layers -9 days,6 layers - 15days)    

4.2.7) PCBA sample mockup(Prototype)    

4.2.8) Follow up with software development    

4.2.9) Initial stage of RF testing  -- RF testing reports    

4.2.10) Hand-made samples' Functional testing and evaluation  --Hand-made samples test reports     

4.2.11) Hand-made samples' electrical test and evaluation  --Hand-made samples test reports    

4.2.12) Hand-made samples' sound quality adjustment  

4.2.13) Development of Engineering Bill of Material EBOM  --EBOM files    

4.2.14) Final assessment and approval of hand-made samples (structural) . (confirmation from both   internal and customers)    Hand-made   samples' final assessment report


5.DVT Stage 

5.1) Structural Molds Development     

5.1.2) 3D modification+2D drawings    

5.1.3) Application for   approval for mold making     

5.1.4) RFQ and selection   of mold manufacturer    

5.1.5) Assessment and   evaluation of mold manufacturers     DFM report     

5.1.6) Confirmation and   approval of quotation    

5.1.7) Commencement of   mold making    

5.1.8) T1-TF     Mold testing   reports    

5.1.9) R&D confirms   the TF results, assemble 10 sets of samples and conduct functional tests.    Assembly test   reports, critical issues reports.     

5.1.10) Reliability Tests - such as vibration test , drop-test,   environmental test..etc., to be completed within 7 days.     Reliability Test   reports    

5.1.11) Provides samples to customers    DVT final   assessment report    

5.1.12) PP-BOM    BOM files 

5.2) DVT Electronics 

5.2.1) Electronics circuit design / modifications and PCB Layout   design/modification /(DVT1-DVTF) --  to be completed before TF stage of mold making process (before the reliability tests)   

--Electrical test report, functional test report, handphone compatible test report, repeatable test report, RF test report. 

5.2.2) Sound quality adjustment and confirmation (complete before DVTF)    

--Sound quality test report (test with music, conversation,(report should include curves, EQ   data)    

5.2.3) Confirmation of   Electric circuit and PCB designs    Produces final   principle drawings of electric and PCB LAYOUT    

5.2.4) Outsourced Testing and   Certifications    

5.2.5) CE static test +EMC/EMI Electromagnetic compatibility  and interference tests (can proceed once T1 is completed) 

--Outsourcing application for approval    

5.2.6) Application of Product Certification (Can proceed once TF is completed)

-- Submit the application form to Quality dept to process.     

5.2.7) Preparation of  samples and information requires for certification.

-- Provides samples   and information to Quality dept to process    

5.2.8) External Certification Institution to provide quotation and agreements for consideration    

5.2.9) Negotiation with   the qualification institution on the quotation agreements    

5.2.10) Provide samples for certifications    samples    

5.2.11) Commencement of certification process with expected completion schedule.     

5.2.12) Preparation of materials for Engineering Pilot Run

5.3) Packaging     

5.3.1) Confirmation of requirement for packaging    

5.3.2) Type setting design    

5.3.3) Laminating drawings (cutting)    

5.3.4) Packaging drawing samples    

5.3.5) Confirmation of laminating drawings    

5.3.6) Packaging samples     

5.3.7) Final confirmation on packaging    

5.4) Colors

5.4.1) Establish color requirements    

5.4.2) Provide color codes and matching     

5.4.3) making color samples    

5.4.4) Color assessment and confirmation 


6. Engineering Pilot (EP) Run     

6.1) E-BOM confirmation

6.2) Notification of EP schedule

6.3) Distribute EP software, SOP, SIP and list of manufacturing jigs and fixtures

6.4) Pre-EP Preparation review meeting. 

   --Functional test report, electric test reports, RF test report, reliability test report, sound(music and conversation) testing report, assembly , structural, electronics critical issues reports, product specifications, BOM, list of jigs and fixtures, SOP & SIP

6.5) EP run and records

6.6) EP tests --EP test report

6.7) Review of EP run EP run report, critical issues report


7. Product Samples

7.1) Test run golden samples    --Critical issues report, distributions drawings and actual samples

7.2) Preparation of Mass --Production (MP) materials


8. Production Pilot Run PP

8.1) Manufacturing BOM (MBOM)    

8.2) Notification of MP   schedule    

8.3) Distribution PP software, SOP, SIP, list of jigs and fixtures    

8.4) Pre- PP preparation review meeting 

--Functional test report, electric test reports, RF test report, reliability test report,   sound(music and conversation) testing report, assembly , structural,   electronics critical issues reports, product specifications, BOM, list of jigs and fixtures, SOP & SIP    

8.4) PP run and record.  --PP run report    

8.4) PP test.  --PP test report    

8.5) PP final review meeting   (proceed to MP if production capacity is >50% & quality passing rate   >80%)    PP run report,   critical issues report     

8.6) Manual     

8.6.1) Manual Typesetting   design    confirm article。    

8.6.3) Review the   contents     

8.6.4) Confirmation of manual -- Manual in Chinese and English plus reminder of FCC, Pro65, etc


9. Mass Production MP 

9.1) Preparation of MP materials    

9.2) Commencement of MP    


Final Remark:Capacity>=80%   of standard man-hour。Passing rate >=90%    

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