Hello Stanley,
In case of multiple characteristics in the inspection plan, the following cases are possible:
Case 1 : all characteristics are assigned to sampling procedure
The system will propose the higher sample size.
Case 2 : One of the characteristics is not assigned to sampling procedure
The system will check if a sampling procedure is defined in higher level (at Quality view in material master). If it found a sampling procedure at material master, system will use it to calculate the sample size and then proposes the higher sample size between characteristics.
Case 3: One of the characteristics is not assigned to sampling procedure and no sampling procedure is defined in material master
In this case, system will use 100% inspection for that characteristics which will get the sample size to the full lot size.
So my proposed solution is :
Either you define a default sampling procedure which will be used in case you don't want to assign a sampling procedure at characteristic level in inspection plan, or you define the sampling procedure as a mandatory input in the plan by setting corresponding flag in control indicators in the characteristic master data.
I hope this answers your question.
Regards,
Ayoub.