How much advance notice would be appropriate in an ordinary case?
Since many orgs are small and have other things they may be working on, conferences to go to etc. A response to a criticism is substantial work, especially for a small team. I would suggest 3 weeks. Some people can be on holiday for two weeks so three weeks covers that case too. I would also say that more effort needs to be made to have a receipt confirmation as if the email lands in spam it’s probably not going to be enough notice if it’s discovered two weeks later.
Since many orgs are small and have other things they may be working on, conferences to go to etc. A response to a criticism is substantial work, especially for a small team. I would suggest 3 weeks. Some people can be on holiday for two weeks so three weeks covers that case too. I would also say that more effort needs to be made to have a receipt confirmation as if the email lands in spam it’s probably not going to be enough notice if it’s discovered two weeks later.