A multiple-domain matrix support for capturing rationale in engineering change management

[+] Author and Article Information
L Siddharth

Centre for Product Design and Manufacturing, Indian Institute of Science, Bengaluru, India - 560012

Prabir Sarkar

Mechanical Department, Indian Institute of Technology Ropar, Rupnagar, India - 140001

1Corresponding author.

ASME doi:10.1115/1.4039850 History: Received October 26, 2017; Revised March 27, 2018


Engineering-changes are proposed to satisfy more requirements and to resolve issues in the existing design of a product. Due to technical, social, and financial constraints, an organisation can only implement few of many change alternatives. In discussions conducted for selecting an alternative, rationale is neither captured completely nor document well. This could be attributed to the lack of knowledge base and retrieval methods to deliver the information required. Engineering-change literature focusses on developing computational methods to capture all effects of a change from relational databases such as Design Structure Matrix (DSM). Design rationale literature relies on expert knowledge to analyse a change in depth, provide a comprehensive description and document the analysis for reuse. In this research, we have attempted to address this problem from both sides. First, we propose multiple-domain matrix to structure the knowledge of a product, its inherent dependencies and its relations with manufacturing processes. Second, we develop a search algorithm based on indirect change propagation to retrieve the effects of a change in design parameter. Third, the outcomes of this search algorithm are grouped and quantified using a metric called Change Propagation Impact (CPI). Fourth, we perform a detailed case study on stapler to construct these matrices and create a database. Further, the database and search algorithms are supported by a web-based tool, which also supports interactive node-link representation and histograms that enrich the quality and quantity of rationale and serve the purpose of documentation very well.

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