# Enhancing the Perceived Quality of a Vehicle Sliding Door Inner Handle Concept Design
## 1 Introduction
### Perceived Quality  
Quality comes from the Latin word qualis, its basic meaning is \"of what kind\", and other meanings it carries include character, nature and essence. [PERSON] defines the eight dimensions of quality as performance, other characteristics that provide the product's attractiveness, reliability, suitability, durability, service, esthetics, and PQ [1]. PQ, as definedby [PERSON] and [PERSON], is a \"belief about the degree of excellence of a goods or service that is derived by examining consciously and/or unconsciously, relevant cues that are appropriate and available, and made within the context of prior experience, relative alternatives, evaluative criteria and/or expectations\" [2].  
PQ is often distinguished from actual manufacturing quality, which is typically defined by adherence to specifications and technical standards. As noted by [PERSON] et al., PQ involves customers' cognitive and emotional responses to a vehicle's design, which can be influenced by esthetics, brand reputation, and user experience [3]. This distinction is essential because while manufacturing quality can be objectively measured, PQ is inherently subjective and varies among consumers based on personal preferences and experiences [4]. Moreover, product quality differs from perceived quality, and human interactions with the product define it [5]. PQ represents the customer's assessment of a product's quality based on visible and hidden cues when they have limited information about its specific quality attributes [6].  
PQ is a multi-approach concept that encompasses various aspects of a product, including its visual harmony, tactile sensations, and sound quality [7]. Industrial design, ergonomics, and psychology are not fundamental branches of science, but the intersection of these fields and perceived quality cannot be ignored [5]. [PERSON] (2020) [8] focused on how consumers evaluate the PQ level of vehicles. Their research investigates visual harmony, like interior and exterior style or color matching of surfaces, which significantly influences consumer perceptions, evokes positive emotional reactions, and contributes to the overall perception [8]. The design attributes of automobiles also significantly impact PQ. For instance, the study by [PERSON] explores how exterior finishes, such as matte versus reflective surfaces, affect consumer perceptions of attractiveness and quality [9]. His study aligns with the findings of [PERSON] et al., who propose a framework for evaluating PQ attributes, suggesting that design elements are critical in shaping consumer perceptions and preferences [10].  
[PERSON] (2011) [11] describes interviews with many automotive users, main attributes of PQ are declared;  
* Visual quality (perfect fit of the parts; similarity between different surface and materials; invisible fasteners; reflection optimization to not distract users);
* Touch/feel quality, pleasantness of surfaces;
* Sound quality (pleasantness of noises and prevent annoying noises);
* Harmony between materials, sizes of the parts, their finishes and smell quality.