Hi $,$

i have checked this question in the tool before and i have been told that the right answer is B which is $$You should measure a minimum of twice a cycle$$ however i have been marked as incorrect in the my academy study $.$ appreciate if an expert can check this for me please and let me know what is the correct answer?

Q$14$:$-$ According to the BOK, which one of the following is a good rule of thumb for a Control Chart?

Select one:

A$)$ It needs at least $25$ plots.

B$)$ You should measure a minimum of twice a cycle

C$)$ Long term cycles can be effectively ignored as they do not add to the total variation

D$)$ All special cause variation must be removed before a Control Chart can be used in the DMAIC process

E$)$ UCLs should be set in consultation with the VOC