Figure 5.

The capability ratio (${\mathrm{C}}_{\mathrm{p}}$) and acceptability ratio (${\mathrm{C}}_{\text{pk}}$) of first run and longest run for output constancy check measured by central ionization chamber of RBA‐3 device with different time to calculate the control limits for (a) 6 MV photon beams and (b) 12 MeV electron beams.