3. Editing & Assigning Criticality

To generate an FMEA or FMECA in the SRA module, and to assess the failure paths that require attention, criticality factors must first be assigned to failure concepts in the failure diagram. The criticality method required will influence the type of fields that must be edited.

For example, FMECAs using the Risk Priority Number (RPN) method require Occurrence, Severity, and Difficulty of Detection factors. Alternatively, FMECAs using the Criticality Analysis (MIL-STD-1629A) method require Failure Effect Probability, FMR, Failure Rate, and Operating Time factors.

Table 1: Criticality Methods in MADE

Important extraction note: the source table's four columns (Criticality Approach, Criticality Method, Criticality Values, Compatible FMECA Report Templates) were interleaved/misaligned by PDF text extraction. The reconstruction below groups each Criticality Method with its Criticality Values (component factors) based on the clear textual association in the extracted content (e.g. "RPN" method paired with "Occurrence / Severity / Difficulty of detection" factors, which is standard RPN methodology), and lists the Compatible FMECA Report Templates as a combined pool since the exact per-method mapping to specific templates could not be confirmed row-by-row from the extracted text.

Criticality Approaches: Quantitative and Qualitative.

Criticality Methods and their component factors:

Method	Component Criticality Values
Criticality Number	1. Severity; 2. Criticality Number (a. Duration, b. Failure mode ratio, c. Failure rate, d. Probability of end effect)
RPN	1. Occurrence; 2. Severity; 3. Difficulty of detection
Fuzzy RPN	1. Apparent occurrence (a. Occurrence, b. Probability); 2. Apparent severity (a. Severity, b. Progression rate); 3. Difficulty of detection
HRI	1. Likelihood (occurrence); 2. Consequence (severity)
ISO26262	1. Severity; 2. Exposure; 3. Controllability
MIL-STD-882E	1. Severity; 2. Probability
Risk Assessment Criteria (FAA)	1. Severity; 2. Probability; 3. Risk

Compatible FMECA Report Templates (pool, associated with the methods above as a set):

• MIL-STD
• Criticality Matrix
• RPN (PHMT)
• SAE (J1739)
• AIAG
• Fuzzy (PHMT)
• HRI (PHMT)
• HRI (Custom)
• ISO26262
• MIL-STD-882E
• ARP4761 Functional

Two methods of editing criticality factors in a MADE model are: using the Properties viewer, or using the dedicated Criticality editor. The guide's example shows "Liquid Flow Rate" selected in the Criticality editor and a "Perforated" fault selected in the Properties viewer.