Initialize Last Cycle Count dates

Hi,

I confuse on the initialize last cycle count dates function

  1. once Initialized Last cycle count dates, all the parts in plants will have one same last cycle count dates? i.e means Run the Initialize Last Cycle Count dates in Dec 06 2018, all parts will have a same last cycle count date stated at Dec 06 2018?

  2. Only run at the first time perform Cycle count or I need to run each time I start a new period of Cycle Count?

Thanks.