Risk-oriented assembly quality analysing approach considering product reliability degradation

Abstract

Assembly process is a critical stage in the formation of product quality and reliability, but related consideration of the produced product reliability and accident risk has not attracted deserved attention in the most assembly quality analysis frameworks. To this end, this paper enhances risk analysis in assembly process quality control, which is advocated by ISO 9001:2015, and presents a risk-oriented assembly quality analysis approach considering the effects of assembly variations on the produced product reliability degradation and accident risk. First, a conceptual QRR chain is presented to illustrate the relationship among assembly process quality (Q), product reliability (R), and failure accident risk (R). Second, a risk-oriented and bidirectional framework for the analysis of assembly process quality is established based on the presented QRR chain aiming to quantitatively identify the risk sources in the assembly process and reduce the risk of failure accidents. Third, an assembly process quality risk model with key function reliability as its core is presented to establish the quantitative relationship between assembly variation and product failure accident risk. Finally, the presented approach is verified through a case study of an assembling quality risk analysing for acid-resistant grinder.

Keywords:

• assembly process
• quality analysis
• product reliability degradation
• accident risk assessment
• QRR chain

ORCID

Yihai He http://orcid.org/0000-0002-9110-2672

Additional information

Funding

This work was supported by National Defense Pre-Research Foundation of China: [Grant Number 6140002050116HK01001]; National Natural Science Foundation of China: [Grant Number 61473017].