Abstract
Selection of the most suitable non-conventional machining process (NCMP) for a ceramics machining represents a multi-criteria decision making (MCDM) problem. This paper describes the application of relatively novel MCDM methods for selecting the most suitable NCMP for the ceramics machining. By applying WASPAS and COPRAS methods, ten NCMPs (alternatives) were ranked based on the ten criteria. Comparison of obtained ranking performances with other MCDM methods used by previous researchers was carried out in order to demonstrate WASPAS and COPRAS applicability and capability for non-conventional machining process selection.
Highlights
Machining of materials can be generally divided in two techniques, i.e. conventional and non-conventional
This paper comprises a comparative study of the use of Weighted aggregated sum product assessment (WASPAS) and complex proportional evaluation assessment (COPRAS) multi-criteria decision making (MCDM) methods to aid in selection of the most suitable non-conventional machining process (NCMP) for a given ceramics machining
Higher performance scores are achieved for the higher value of λ, i.e. when the WASPAS method behaves like the weighted sum model (WSM) method
Summary
Machining of materials can be generally divided in two techniques, i.e. conventional (traditional) and non-conventional. Non-conventional machining processes (NCMPs) are defined as a group of machining processes that remove excess material by various techniques involving mechanical, thermal, electrical or chemical energy as well as combinations of these ones. They can process the contemporary difficult-to-cut materials, like ceramics and ceramic-based tool materials, generating complex and intricate shapes in materials with high strength-to-weight ratio. Researchers have proposed the use of various multi-criteria decision making (MCDM) methods for selection of the most suitable NCMP for the given application. Sadhu and Chakraborty [8] proposed the use of data envelopment analysis (DEA) method for solving NCMP selection problems. This paper comprises a comparative study of the use of WASPAS and COPRAS MCDM methods to aid in selection of the most suitable NCMP for a given ceramics machining
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