We manufacture fluids used in automotive, so the production process involves blending chemicals according to a recipe. The raw materials are either weighed in or pass through a mass flow meter. A question came up, do we need to calibrate the mass flow meters? We perform 100% final inspection of the finished product.
The flowmeters are not called out on the control plan. We do not call out measurement devices used in the production process on the control plan as we are aware that we will have to perform statistical studies on these if they are in the control plan.
Isn't up to us as an organization to decide if and how we verify / calibrate flow meters used in the production process? And this would be based on our risk assessment of what can happen if the flow meters are given erroneous readings.
7.1.5.1 says: The organization shall determine and provide the resources needed to ensure valid and reliable results when monitoring or measuring is used to verify the conformity of products and services to requirements.
My interpretation of the above: Our flowmeters are used for process control, and not to verify the conformity of the product to the requirements. 100% final inspection of the finished product is how we verify the conformity of the product to the requirements.
7.1.5.2 Measurement Traceability says: When measurement traceability is a requirement, or is considered by the organization to be an essential part of providing confidence in the validity of measurement results (then we must calibrate...)
My interpretation of the above: We decided if measurement traceability is required and essential (as long as our customers have not mandated it) for the equipment used in the production process.
Am I missing something or mis-interpreting?
The flowmeters are not called out on the control plan. We do not call out measurement devices used in the production process on the control plan as we are aware that we will have to perform statistical studies on these if they are in the control plan.
Isn't up to us as an organization to decide if and how we verify / calibrate flow meters used in the production process? And this would be based on our risk assessment of what can happen if the flow meters are given erroneous readings.
7.1.5.1 says: The organization shall determine and provide the resources needed to ensure valid and reliable results when monitoring or measuring is used to verify the conformity of products and services to requirements.
My interpretation of the above: Our flowmeters are used for process control, and not to verify the conformity of the product to the requirements. 100% final inspection of the finished product is how we verify the conformity of the product to the requirements.
7.1.5.2 Measurement Traceability says: When measurement traceability is a requirement, or is considered by the organization to be an essential part of providing confidence in the validity of measurement results (then we must calibrate...)
My interpretation of the above: We decided if measurement traceability is required and essential (as long as our customers have not mandated it) for the equipment used in the production process.
Am I missing something or mis-interpreting?