Function Analysis

Function analysis is the third step of FMEA analysis, with the goal of defining functions and requirements for each structural element. This guide explains how to perform function analysis.

Function Definition

• Goal: Define functions and requirements for each structural element. If a function has multiple requirements, create multiple records.
• Role: Implementation role member
• Operations:
  • Select a structural element, click "+" in the "Function" section of the right panel.
  • Clearly describe "what it is" and "what it should do".
  • Example: Seal ring -> Function: Provide waterproof seal at interface; Requirement: Withstand at least 10 Bar pressure.

Related Functions

Related functions provide a forward design model for systematically describing relationships between functions at various product levels.

Function Network

Function network is a visualization tool that displays technical dependencies between system elements at various levels graphically.

When functions at various levels are connected according to hierarchical logic, they form a functional network. It is also the analysis foundation for subsequent failure analysis (Failure Network), where logic lines in the functional network transform into default failure chains.

Characteristic List

Characteristic list is used to summarize the requirements and specifications that the product or process must meet throughout the project.

Parameter Diagram

Parameter diagram is a systems engineering tool that clearly shows the relationship between ideal functions, control factors, noise factors, and potential error states, providing a systematic framework for in-depth FMEA analysis.