кто знает подскажите, пожалуйста, значение "follow-up stability" в контексте:

This report presents data from batches of *** Tablets placed in formal stability and batches placed in follow-up stability.

Контекста, к сожалению, мало, дальше идут таблицы, которые, на мой взгляд, не отличаются для follow-up stability и formal stability.

Спасибо

follow-up stability trials in final packaging are conducted to assess the validity of the shelf-life.
http://64.233.183.104/search?q=cache:Dl3Y9-TGdHQJ:www.info.gov.za/regulations/2003/24785/24785b.pdf+"follow-up+stability"&hl=ru&ct=clnk&cd=88&gl=ru&client=firefox-a

Follow-up stability data derived from the specific batch of the product stored at the maximum recommended storage conditions should be submitted every three months, till the end of the extended shelf-life.

http://64.233.183.104/search?q=cache:d3NIe9ZgnZIJ:www.mccza.com/documents/2.08%20Post-reg%20amendments%20Nov06%20v3.doc+"follow-up+stability"&hl=ru&ct=clnk&cd=73&gl=ru&client=firefox-a