Media fill intervention

Dear All,
I have some queries as :

  1. If we need to define the Media flushing qty. before filling and it should be the same qty for product flushing?

  2. How we should conduct plant power shut down as actual way?

3.what should be the actual consideration of start time? as after opening of storage vessel valve for filling or regular filling.

  1. If there will be 2 pump change how it can be justified? As Actually we are doing one pump change?
  2. If routine intervention repeats for 3 to 5 times and crossing the approved intervention of 10 min, is it ok ?!! Let Loading of sterile bottle.