Sampling Plan
The Sampling Plan defines the sampling regimen to apply products, through the collected sample.
Such registry determines the number of product units to inspect per individual lot (sample size or sample size series) and the lot acceptance criterion (Approval or Rejection Number).
The values displayed in this routine are of previously registered table corresponding to NBR 5426 norm. To remain true to said norm, such values cannot be changed. Thus, to add own sampling criteria, entered fields are different from those related to norm, and require the creation of formulae for lot size calculation.
This version makes the Internal Sampling Plan process available, making test inspections possible, using a specific plan created according to the user's needs.
To apply the Internal Sampling Plan, entered in the Plan Type Registry, you must define up to 5 sequences in the sample size, which are:
Table 1 |
|
0 |
Generic |
1 |
N/C Type 1 |
2 |
N/C Type 2 |
3 |
N/C Type 3 |
4 |
N/C Type 4 |
For each sample size sequence, enter the Accept, Reject, and Sample. For Normal and Severe sampling types, you can define only one type.
The sample size sequence is attached to the nonconformance classes indicated in the Inflow Inspection. The same is applied as follows:
Table 02 |
||
Sequence |
NC Classes |
Description |
0 |
(all) |
Generic |
1 |
A |
Very Serious |
2 |
B |
Serious |
3 |
C |
Moderately Serious |
4 |
D |
Internal Control |
Notice that the 0 (Zero) sequence refers to all Nonconformance Classes.
After Sampling Plan registration, with the sample sequences defined, you must make the association: Product-Revision x Suppliers, specifying the samples on which the Internal Sampling Plan applies at inspection time, through the Test Sampling Plan.
The Internal Sampling Plan Process is performed when collecting measurements in the Results when its respective nonconformances are indicated and, when confirmed, the system processes data the following way:
| • | All nonconformances indicated in the test are taken into account, grouped per class, according to 02 table. In the 0 - Generic sequence, all nonconformances are taken into account, independently of class. |
| • | Subsequently, the Sample Code defined in the plan is checked, according to the inflow lot size being inspected. |
| • | Acceptance and rejection checking takes place through the sequences registered for the plan, according to the 02 table. In the 0 (Zero) sequence find the sum of all nonconformances, while the remainder comply to the classes defined for the nonconformances. At this moment, the system checks whether the number of nonconformances is lower to the rejection limit defined in the plan, according to sequence. If rejection takes place in one of the sequences, the Lab Report is suggested as Rejected. For there to be approval, the amount of nonconformances must be lower than that specified in the plan, this being evaluated per class. |
| • | Upon entering a test associated measurement, in case you change the Sample Type to 2 = Double, the plan analysis is performed as Severe Sampling, as defined in Sampling Plan Registry. |
| • | The system also checks whether the sampling size (number of entered measurements), is lower than that defined in the Internal Sampling Plan and, if so, a warning message is displayed. |
| • | Upon confirmation of test related measurements, the need for a second sampling is checked, in case the number of measurements is between acceptance and rejection defined in the Internal Sampling Plan. |
There is no report for the lab suggested as Conditional Approval. In an Internal Sampling Plan, the report may be Approved or Rejected. |
Procedures
To register Sampling Plans:
| 1. | In the Sampling Plan addition screen, select the Add option. |
Complete the fields according to Field Help instructions.
| 2. | After typing the plan's data, you need to ascribe it the sizes obtained in the sample, paying the following field special attention. |
For those samples registered under the NBR type, the system already displays the affixed values, that is, the sample sizes are calculated and displayed in this screen, as exemplified by the subsequently described fields, which correspond to NBR 5426. |
| 3. | When the sampling plan is not registered under the norms, you need to enter the Sample Size quantities. |
See also:
To query the Sample Plan registry, see tables in the Query Generic Registries topic:
| • | QA6 - Sampling Code |
| • | QA7 - Sample Size Table |
To query registries involved in this process, see topics: