FMEA – Occurrence

User Modules

Task, project & quality management
Contacts and directories module (CRM)
Web management and automation
Human resources
Products, assets and sales
Finance management
Metrics and Measurements

Technical Modules

Sabre plugin module
Enterprise Architect connector

System Modules

The AyMINE Framework Module
System Management

Give us contact

Do you prefer to ask us directly?

Call us +420 605 203 938 (the Czech Republic)

or use this contacts

FMEA – Occurrence

Occurrence is the likelihood that a specific failure cause /mechanism will occur during the design life.

The estimate is based on experience with similar products or previous versions. It is necessary to consider how the new version/new product differs and how these changes affect the probability of failure.

If the data is not available, expert judgment is used.

If the estimate is on the boundary of two levels, the higher level is used. If it cannot be estimated, level 10 is used.

Occurrence Rating

Very High

Rank 10 New technology/new design with no history. ≥ 100 per thousand

High

Rank 9 Failure is inevitable with new design, new application, or change in duty cycle/operating conditions. 50 per thousand

Rank 8 Failure is likely with new design, new application, or change in duty cycle/operating conditions. 20 per thousand

Rank 7 Failure is uncertain with new design, new application, or change in duty cycle/operating conditions. 10 per thousand

Moderate

Rank 6 Frequent failures associated with similar designs or in design simulation and testing. 2 per thousand

Rank 5 Occasional failures associated with similar designs or in design simulation and testing. 0,5 per thousand

Rank 4 Isolated failures associated with similar design or in design simulation and testing. 0,1 per thousand

Low

Rank 3 Only isolated failures associated with almost identical design or in design simulation and testing. 0,01 per thousand

Rank 2 No observed failures associated with almost identical design or in design simulation and testing. ≤ 0,001 per thousand

Very Low

Rank 1 Failure is eliminated through preventive control.

Links to useful sites