Quality Management 2017

A NALYZE

10. Process monitoring: choice of control chart

Part 1 :

Type of drifts to detect

Control charts

Introduction to SPC

Ex.: wrong adjustment of linac’s parameters, errors during measurement…

Large and Fast

Individual value / Moving Range Indi i l value / g

Part 2 :

( I -MR)

Essential concepts to start with SPC

Patient number

Diff. mes/calc. (%)

EWMA - Exponentially Weighted Moving Average -

Ex.: drift of the detector’s dose response

Small and slow

Part 3 :

SPC in practice

Patient number Diff. mes/calc. (%)

Part 4

Conclusion

03/10/17

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