Hello,
Can any one help me on the following querry?
We are an ISO/TS 16949 company manufacturing Automotive parts.
We are having different types of process and we have PFMEA for all process.
One of the process is measuring a membrane assembly and the requirement is height of the membrane assembly. The membrane assembly is assembled by spacers and washers and the height will be measured. Due to cumulative tolerance variation in the Spacers / washers, if the height is not achieved the membrane assembly will be reworked to achieve the required height by adding or removing washers. (May be 50% of the assemblies are reworked). The height will be measured 100% for all the membrane assemblies to check whether the height is within the specification. If the height is within the specification then only the assembly will be moved to next operation.
We have prepared a PFMEA stating the Failure mode as "Diaphragm assembly height not within the limit" and given the occurance rating as 1 because all the membrane assemblies are checked 100% for height and none of the assemblies will moved to next operation if the required specification is not met. Hence there is no failure in meeting the height when the assemblies are move to next operation. Whether our understanding is correct or we have to consider the rework at the individual stage and rate the occurance accordingly?
Pl help?
Can any one help me on the following querry?
We are an ISO/TS 16949 company manufacturing Automotive parts.
We are having different types of process and we have PFMEA for all process.
One of the process is measuring a membrane assembly and the requirement is height of the membrane assembly. The membrane assembly is assembled by spacers and washers and the height will be measured. Due to cumulative tolerance variation in the Spacers / washers, if the height is not achieved the membrane assembly will be reworked to achieve the required height by adding or removing washers. (May be 50% of the assemblies are reworked). The height will be measured 100% for all the membrane assemblies to check whether the height is within the specification. If the height is within the specification then only the assembly will be moved to next operation.
We have prepared a PFMEA stating the Failure mode as "Diaphragm assembly height not within the limit" and given the occurance rating as 1 because all the membrane assemblies are checked 100% for height and none of the assemblies will moved to next operation if the required specification is not met. Hence there is no failure in meeting the height when the assemblies are move to next operation. Whether our understanding is correct or we have to consider the rework at the individual stage and rate the occurance accordingly?
Pl help?