Difference Between Attribute And Variable Sampling Plans

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