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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