Calculation of Sample Size 
Calculation of Sample Size
Use
Once an inspection specification has been assigned to an inspection lot, the sample size must be calculated for the inspection lot. The sample size can be determined as follows:
The sample size must be calculated before you can print the sample drawing instructions or the inspection instructions (see
Printout of Instructions).Prerequisites
The system can only calculate the sample size automatically if you use an inspection specification to inspect the goods in the inspection lot.
Features
The following table describes the methods in which the sample size can be calculated for an inspection lot:
Method |
Description |
Automatic calculation of the sample size |
If you intend to inspect the goods in an inspection lot using an inspection specification, the system uses the sampling procedures assigned to the inspection characteristics in the inspection specification and the existing quality level to calculate the sample size automatically. If you intend to inspect the goods in an inspection lot without an inspection specification, the system calculates the sample size using one of the following controls in the inspection data of the material master:
|
Triggering the calculation of the sample size manually |
You may want to trigger the calculation of the sample size manually even though you intend to inspect the goods with an inspection specification. In this case, you must:
|
Manual entry of the sample size |
If you intend to inspect the goods in an inspection lot without an inspection specification and you want to enter the sample size manually, you must activate the Manual sample entry indicator in the inspection settings of the material master. |
Result
After the sample has been calculated automatically or entered manually, the system changes the inspection lot status to reflect that the sample size has been calculated. If in the process of calculating the sample size, the system determines that the current inspection stage for the lot is a "skip", the system displays a corresponding message and the inspection lot status is set accordingly.
In some cases, the system may display a message that the sample size has been calculated. However, after checking the sample size, you determine that the sample size is zero. This occurs if the inspection specification contains only optional characteristics, which are not used in the sample calculation.
See also:
Calculating the Sample Size (Example) Cancellation of Sample Calculation