SUPPLIER QUALITY ASSURANCE PLAN
GUIDELINE

1(62)

Uppgjord - Prepared

Nr - No.

LD/ECS/CI/LM Cai Remitz

CI/LQ-98:2656

Dokansv/Godkänd - Doc respons/Approved

Kontr - Checked

Datum - Date

Rev

File

LD/ECS/CI/LPC Nicklas Jonsson

99-02-18                    C

Table of Contents

1

Introduction.............................................................................................................................3

1.1

Abstract............................................................................................................................3

1.2

Application.......................................................................................................................3

1.3

Purpose ............................................................................................................................3

1.4

Reading suggestions .........................................................................................................3

2

Ericsson Procured Material Quality Assurance.........................................................................4

2.1

The Procured Material Quality Assurance Organisation ....................................................4

2.2

The PMQA Organisation within Research and Development ............................................4

2.3

The roles at Ericsson regarding the requirements on a component .....................................5

2.4

The Ericsson Supplier Academy .......................................................................................6

2.5

Supplier Improvement Program (SIP) ...............................................................................6

3

Ericsson Quality Targets..........................................................................................................7

3.1

PPM levels .......................................................................................................................7

3.2

Yield levels ......................................................................................................................7

3.3

Capability levels ...............................................................................................................8

4

Supplier Quality Assurance Plan (SQAP) ................................................................................9

4.1

Purpose ............................................................................................................................9

4.2

Level and amount of work required...................................................................................9

4.3

Quality Requirements Planning.......................................................................................11

4.4

SQAP Requirements.......................................................................................................12

4.5

Execution and submission of the individual steps in the SQAP........................................13

5

PMQA and supplier processes in a typical high-volume project .............................................14

5.1

Milestone 1.....................................................................................................................14

5.2

Milestone 2.....................................................................................................................15

5.3

Milestone 3.....................................................................................................................16

5.4

Milestone 4.....................................................................................................................17

5.5

Milestone 5.....................................................................................................................18

5.6

Milestone 6.....................................................................................................................19

5.7

Milestone 7.....................................................................................................................20

5.8

After milestone 7 ............................................................................................................21

6

The 10 steps in the SQAP ......................................................................................................22

6.1

Design Producibility Review (DPR) ...............................................................................22

6.2

Process Failure Mode and Effect Analysis (Process FMEA)............................................24

6.3

Design of Experiments ...................................................................................................26

6.4

SPC and Inspection Plan.................................................................................................29

6.5

Preparation for the Serial Process Verification Run (Preparation SPVR) .........................32

6.6

Quality Plan for Sub-suppliers ........................................................................................36

6.7

Gauge Repeatability and Reproducibility ........................................................................38

6.8

Capability Studies...........................................................................................................42

6.9

Process Sample Approval (PSA).....................................................................................44

6.9.1

Dimensional check of Process Samples....................................................................45

6.9.2

Functionality and Reliability of Process Samples .....................................................46

6.9.3

Cosmetics of Process Samples .................................................................................47

6.10

Serial Process Verification Run (SPVR) .........................................................................48

6.10.1

The process capability study ....................................................................................49

6.10.2

The capacity verification..........................................................................................52

7

SPVR results and actions .......................................................................................................57

7.1

General requirements......................................................................................................57

7.2

Possible scenarios and recommended actions ..................................................................58