Quality Management 2017

A NALYZE

9. Control charts

• Definition:  monitor processes over time.  a centerline  2 statistical control limits (based on the natural variation of the process).

Carte de contrôle des valeurs individuelles

3,0%

Part 1 :

2,5%

Control limit

2,0%

Introduction to SPC

1,5%

Mean

1,0%

X

0,5%

0,0%

-0,5%

Control limit

Individual Value (%)

-1,0%

Part 2 :

-1,5%

0

10

20

30

40

Monitored parameter

Patient number Data (chronological order)

Essential concepts to start with SPC

 Monitor process and maintain under control; • Objectives:

Part 3 :

 Adjustments only when necessary and with caution not to over adjust.

SPC in practice

 To take decisions on the process.

 Predictive tool.

Part 4

 Use of STATISTICAL CONTROL LIMITS to detect special causes that disturb the process before the results are out of the specifications.

Conclusion

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