Quality Management 2017
A NALYZE
11. Control charts building: Individual value
Type of drifts to detect
Control charts
Part 1 :
Introduction to SPC
Ex.: wrong adjustment of linac’s parameters, errors during measurement…
Large and Fast
Individual value / Moving Range Individual value /
( I -MR)
Part 2 :
Patient number
Diff. mes/calc. (%)
Essential concepts to start with SPC
Example of a measurement logbook EWMA - Exponentially Weighted Moving Average -
Ex.: drift of the detector’s dose response
Small and slow
Part 3 :
Patient number Diff. mes/calc. (%)
SPC in practice
Patient #
Beam #
Part 4
Conclusion
Individual values
03/10/17
25
Made with FlippingBook - Online Brochure Maker