Quality Management 2017

3. Goal: Reaching the target with minimal variation

• Two types of causes of variability :

Part 1 :

 Common causes (or random causes) Inherent in the process, responsible from small varia tions  Special causes (or assignable causes) Not inherent in the process, their effects significantly disturb the normal evolution of the process

Introduction to SPC

Part 2 :

Essential concepts to start with SPC

‘In-control’ process

‘Out of control’ process

Part 3 :

SPC in practice

Common causes of variability

Common and special causes of variability

Part 4

Conclusion

Statistically predictable

Statistically unpredictable

Aim of SPC: to make processes in control

03/10/17

10