Audits and sampling

Answer:

Every audit compares reality with audit criteria. Reality is very wide, and no one can audit reality exhaustively. So, every audit is performed by taking samples of reality and comparing them with audit criteria to get audit evidences. When designing your sample take care to assure that samples are representative and unbiased. Good audit practice should ensure that you audit program includes all processes. All processes must be audited, but for example you can audit the Commercial Process and take the internal market as a sample, leaving for another future audit the external market.

The following material will provide you information about audits:

- ISO 9001 – What is the ISO 9001 audit program, and how does it work? - https://advisera.com/9001academy/blog/2017/01/24/what-is-the-iso-9001-audit-program-and-how-does-it-work/ at-is-the-iso-9001-audit-program-and-how-does-it-work/
- 13 Steps for ISO 9001 Internal Auditing using ISO 19011 - https://advisera.com/9001academy/knowledgebase/13-steps-for-iso-9001-internal-auditing-using-iso-19011/
- free online training ISO 9001:2015 Internal Auditor Course - https://advisera.com/training/iso-9001-internal-auditor-course/
- book - Discover ISO 9001:2015 Through Practical Examples - https://advisera.com/books/discover-iso-9001-2015-through-practical-examples/