How Certification Audit Days Are Estimated
Understand the few inputs that have the biggest effect on audit time and price.
People are the starting point
Audit-duration models usually begin with effective personnel. Part-time, seasonal, repetitive and shift-based work may need different treatment depending on the standard and scope.
The standard changes the model
Information security, food safety, energy and medical-device systems do not all use the same inputs. The GCM calculator reveals only the additional questions needed for the standards you select.
Sites, risk and complexity
More sites and higher-risk physical activities can increase audit time. Multi-site sampling, where permitted, remains a certification-body decision rather than an automatic discount.
Estimate first, confirm second
Use the estimate to budget and compare. The provider confirms the final audit duration after reviewing scope, activities, sites and certification history.