Construction QC QA Sampling 1

Quality Control / Quality Assurance

Sampling for Quality Control

Senior/Graduate

HMA Course

Construction QC QA Sampling 2

Requirements For a Sampling and Testing

Program

1. Frequency of Tests?

2. Location of Samples?

3. Size of Samples?

7-2

Construction QC QA Sampling 3

Reasons for Sampling Materials

1 . Certification or Source Approval

2 . Process/Quality Control

3 . Acceptance

4 . Independent Verification Samples

Construction QC QA Sampling 4

Types of Sampling

1 . Judgment Sampling

2 . Quota Sampling

3 . Systematic Sampling

4 . STRATIFIED SAMPLING

5 . RANDOM SAMPLING

Construction QC QA Sampling 5

Lot or Population

Construction QC QA Sampling 6 7-4

Sample from a Lot

Specimen 1 Specimen 3

Specimen 2

Construction QC QA Sampling 7

Random Locations

x Biased Locations

Sampling Location