Table 1.

The number of first run points before out‐of‐control limits and number of longest run points on the X‐charts for 6 and 10 MV photon beams, and 6, 9, 12, 16, and 20 MeV electron beams. Each month is equal to 4 data points. N is the number of data points used to calculate the limits.

N	6X '09		10X '09		6E '09		9E '09		12E '09		16E '09		20E '09
(months)	$1^{\text{st}}$	Long	$1^{\text{st}}$	Long	$1^{\text{st}}$	Long	$1^{\text{st}}$	Long	$1^{\text{st}}$	Long	$1^{\text{st}}$	Long	$1^{\text{st}}$	Long
1	5	5	5	7	5	5	8	11	13	29	6	12	5	11
2	12	15	12	15	14	15	14	15	13	29	14	15	14	15
3	12	15	14	15	14	15	14	15	13	29	14	15	14	15
4	30	30	30	30	30	30	14	15	13	29	14	15	14	29
5	30	30	30	30	14	15	12	15	12	29	14	15	14	15