Warehouse climatic mapping is required whenever regulatory controlled product is stored either between processes or as a finished product in the warehouse. There is a cGMP requirement that the warehouse storage conditions must be validated. This is to verify that where storage conditions have been specified; they are complied with, and where they are not specified; to ensure that the storage conditions will not cause irreparable damage to the product or the product packaging or any appended documentation. Where there are no conditions specified then best practice must be followed and best practices are available in guidance documents from regulatory authorities world-wide. These should be discussed and a documented justification for the values adopted included in the Validation Plan.
Validation of these storage climatic conditions must verify that all shelf and free standing areas where product is to be stored; must remain within the temperature and humidity levels specified in the storage specifications for the product. These storage conditions must be maintained regardless of seasonal variations in the local ambient weather system. Where these are extreme it may require the validation task to be run continuously through theses seasons or simply repeated during their occurrence. This matter should be discussed and a documented justification included in the Validation Plan.
For many years warehouse climatic mapping tasks involved running hundreds' of metres of sensor cable and weaving in out shelving, across access passages and generally making life difficult for the often exasperated warehouse staff. Now; using wireless individual data loggers the task has become a lot less intrusive, individual data logger sensors can be attached to shelving support structure (using adhesive tape), so keeping them clear from the routine product movement that the shelves are subjected to. In fact the sensors can be installed discretely in a matter of minutes and left unattended for the complete duration of the mapping exercise.
The number of; and location of; individual data logger sensors required for successful warehouse climatic mapping is governed by several factors, disruptive air flow entering or leaving the storage area, distribution of conditioned air inlet and exhausts, open doorways and or windows and generally the environmental insulation to walls and ceilings. A typical layout for 1000 square metre warehouse climatic mapping with shelves stacked 4 metres high; good general wall and roof insulation; no open doorways or windows and evenly spaced-out condition-air inlets and exhausts, could be one sensor in each corner of the storage area, and one midway along each wall, with one in the centre. This means nine sensors would be placed on the lowest storage shelf, then nine on the middle shelf and finally nine on the top shelf. Smaller rooms could be scaled similarly, with one sensor in each corner and one high layer and one lower layer, giving a total in a smaller room of eight sensors. If there are disruptive influences to the general air in /out flows or to the location of the conditioned air inlet and or exhausts then these location would have to be altered and would possibly have to be establish by conducting preliminary warehouse climatic mapping air flow studies. However when the position and number of sensors has been agreed, the justification for your choice must be documented in the Validation Plan. Are you beginning to see just how important the Validation Plan is?
As stated above the advent of the low priced accurate data logger has changed the task of climatic mapping large buildings and warehouses. We now use these data loggers for all large temperature and humidity mapping tasks. It has cut the cost dramatically. It has also simplified the task considerable and changed the task from one that had to be carefully planned and integrated to cause minimal disruption, to one that now goes barely noticed.Data logger Specifications.
As stated above the advent of the low priced accurate data logger has changed the task of climatic mapping large buildings and warehouses. We now use these data loggers for all large temperature and humidity mapping tasks. It has cut the cost dramatically. It has also simplified the task considerable and changed the task from one that had to be carefully planned and integrated to cause minimal disruption, to one that now goes barely noticed.
The specification of the data loggers we use is given below:
Storage Capacity 16,382 Temp and Humidity Readings
(32,764 Total Readings/Samples) Humidity
Measurements Range: 0 to 100% RH
Accuracy: ±3.0%RH Overall (20 to 80% RH)
Internal Resolution: 0.5 %RH
Long Term Stability: 0.5 % RH per Year Temperature Measurements Range: -35°C to 80°C (-31°F to 176°F)
Repeatability: ±0.1°C (±0.2°F)
Accuracy: ±0.5°C (±1°F) Overall
Internal Resolution: ±1.1°C (±2°F) Overall Dew Point Accuracy
(25°C, 40-100%RH) ±1.1°C (±2°F)
We supply these data loggers in multiples of five. Each multiple is supplied with its own DVD containing a copy of the associated software.
Validation, Risk & Requirements Plan (VrrP) is one document designed
specifically to replace three. The contents of the three original documents
were completely revised and edited into a more compact and interactive
format. Resulting in the document becoming notably easier to use and
quicker to review and amend. This new format will make a very significant
difference to the man hours required to produce and execute these
documents. There will also be a very noticeable reduction in the time
required for the reviewing and approving tasks. This new document titled
the VrrP replaces the VP, VRA & URS and now compliments our equally new 4Q
Protocol, which integrates the DQ/IQ/OQ/PQ into one document.
This is an essential step forward for companies seeking to reduce validation costs without sacrificing regulatory compliance.
4Q Equipment Validation Protocol (4Q-Equip) has been designed
specifically to replace four standard protocols. By taking the
contents of the four protocol and carefully weaving them into one notably easy
to use protocol, we have made a significant advance in the task of streamlining
validation documentation by reducing protocol numbers by close to 75%.
The new bang up to date 4Q protocol replaces the DQ, IQ, OQ & PQ and now
compliments our equally new VrrP Protocol. By integrating the old style
DQ/IQ/OQ/PQ into one 4Q document there will be enormous savings in man hours in
the authoring, reviewing, updating and approving tasks.
For everyone's convenience, it is still written in word.