Predictable Quality Management With Good Weighing Practice™

Operating a weighing system in compliance with any current quality management system requires a good understanding of the regulations, of the parameters influencing the measurement accuracy and of the process requirements. METTLER TOLEDO proposes a straightforward five step methodology. It combines all of these relevant parameters to consistently achieve regulatory compliance and maintain top quality: Good Weighing Practice™ (GWP®).

Operating a weighing system in compliance with any current quality management system requires a good understanding of the regulations, of the parameters influencing the measurement accuracy and of the process requirements. METTLER TOLEDO proposes a straightforward 5 step methodology combining all these relevant parameters to consistently achieve regulatory compliance and maintain top quality: GWP^® (Good Weighing Practice™).

If quality used to be primarily a question of accuracy, it is now increasingly associated to the concept of risk evaluation and risk management. It is the daily preoccupation of the quality managers of many different Industries.

Experience put in straightforward weighing practice
Each application is a unique case. The regulations (ISO, GLP, GMP, GFSI, etc.) remain silent as per the practical application of the requirements. METTLER TOLEDO has put decades of technical leadership and field experience in GWP^® to provide any user:

Guaranteed quality
Reduced costs
Safe audits
Peace of mind

User will receive a printed GWP^® recommendation describing:

The appropriate scale satisfying accuracy requirements from smallest net quantity to be weighed to maximal load.
The documentation package requested along the applicable regulation
All the required tests (Calibration and user routine tests) and the frequency at which these shall be conducted
The test weights to be used
The standard operating procedures (SOP) for the routine tests

5 Steps to Good Weighing Practice™

STEP 1: Good Evaluation
Evaluation of the process requirements from a metrological perspective.

Weighing range
Smallest net weight
Process tolerance
Applicable regulations
Need for safety margin

This will lead to a variety of possible instruments fulfilling above requirements.

STEP 2: Good Selection
Selection of the scale fulfilling all the above requirements.

STEP 3: Good Installation
Documenting that the installation has taken place appropriately.
A comprehensive quality documentation contains evidence that unpacking, installation, set-up, configuration, calibration, adjustment and training have taken place and that the installed equipment still fulfills the requirements it was selected for.

STEP 4: Good Calibration
A calibration will document the scale’s effective performance under the influence of environmental factors. Issuing a calibration certificate to the locally applicable regulations and documenting thus the performance of a scale at a regular interval is the task of a trained technician.

STEP 5: Good Operation
Establish a routine operation procedure and routine tests that will guarantee that at all times the quality criteria of the weighing process are fulfilled.

Learn more about Good Weighing Practice™, about evaluation of risks or about how to properly operate a scale and log onto: