Comparison between attribute and variable sampling plans
|
Data |
Attribute sampling plan |
Variable sampling plan |
| Type of item | Each item is classified as defective or non-defective (Gauging) | Measurement must be taken on each item. |
| Cost | Cheap | Costly |
| Skill | Less | More |
| Sample size | Large | Small |
| Assumption | None | Follows Normal distribution |
| Parameters used | N, n, c, r | M, K, σ |
| Calculations | Decision criteria does not involve calculations | Decision criteria involves calculation of mean and SD |
