In pharmaceuticals alert and action limits are very important, because these limits are
effective control to the process.
Alert and Action limits are in house limits, these limits must be less than guideline limits or
define limits.
Alert and Action limits defined based on trend analysis.
Alert and Action limits are like a barrier before the guideline limits.
๐๐ฅ๐๐ซ๐ญ ๐ฅ๐ข๐ฆ๐ข๐ญ
To be alert the microbial counts reach to this alert level.
It is nor necessary to take any action.
Possible deviation from normal process condition.
This is a trigger, that something is going wrong means microbial count increasing that area.
๐๐๐ญ๐ข๐จ๐ง ๐๐ข๐ฆ๐ข๐ญ๐ฌ:
When microbial count reach this action limits then action is mandatory.
To control the microbial count in the area.
Signal an apparent deviation from normal process condition And require immediate action.
If not controlled, we might get area failure.
These alert and action limits must be less than final limits.
๐๐ฑ๐๐ฆ๐ฉ๐ฅ๐
Active air sample Grade -C Final limit 100.(as per EU GMP, WHO-GMP, D&C schedule-m
and PIC/s).
to establish the alert limit based on trend analysis – 20
to establish the action limit based on trend analysis – 24.
๐๐ข๐ ๐ฆ๐ ๐๐๐ฌ๐ข๐ฌ ๐ฅ๐ข๐ฆ๐ข๐ญ๐ฌ
๐๐ฅ๐๐ซ๐ญ ๐ฅ๐๐ฏ๐๐ฅ
Alert Level = Average +2 X Sigma
Ex: Average limit = 11.28
Standard Deviation (sigma) =4.16
= 11.28 + 2 X 4.16=20
๐๐๐ญ๐ข๐จ๐ง ๐ฅ๐๐ฏ๐๐ฅ
Action Level = Average + 3 X Sigma
Ex: Average limit = 11.28
Standard Deviation (sigma) =4.16
=11.28 +3 X 4.16=24
All observations related to the water system and environmental monitoring are subject to
trend analysis. Trends are prepared but its limit always remains a point of discussion because
all regulatory guidelines provide a single limit for the tests. No alert and action limit is given.
Sufficient data should be available to determine the alert and action limits by 3 sigma
formula. Alert and action limit of water system and environmental monitoring should be
calculated with minimum one year data because results vary in different seasons of the year.
