Santosh Jagtap

Requirements and use of in-service information in an engineering redesign task: Case studies from the aerospace industry

A huge number of informal messages are posted every day in social network sites, blogs, and discussion forums. Emotions seem to be frequently important in these texts for expressing friendship, showing social support or as part of online arguments. Algorithms to identify sentiment and sentiment strength are needed to help understand the role of emotion in this informal communication and also to identify inappropriate or anomalous affective utterances, potentially associated with threatening behavior to the self or others. Nevertheless, existing sentiment detection algorithms tend to be commercially oriented, designed to identify opinions about products rather than user behaviors. This article partly fills this gap with a new algorithm, SentiStrength, to extract sentiment strength from informal English text, using new methods to exploit the de facto grammars and spelling styles of cyberspace. Applied to MySpace comments and with a lookup table of term sentiment strengths optimized by machine learning, SentiStrength is able to predict positive emotion with 60.6p accuracy and negative emotion with 72.8p accuracy, both based upon strength scales of 1–5. The former, but not the latter, is better than baseline and a wide range of general machine learning approaches.

Design and Development of Products and Services at the Base of the Pyramid: A Review of Issues and Solutions

The base of the world income pyramid, generally called the ‘Base of the Pyramid’ (BoP), consists of four billion people with average per day income of less than four dollars. Over the past several years, the design and development of products and services at the BoP (BoP people as producers and consumers as well) has been investigated by several authors from different disciplines. A literature review showed that the issues (i.e. constraints) in designing and developing products and services at the BoP and ingredients of solutions addressing these issues have not been synthesised. Furthermore, quantitative findings on these issues and solution-ingredients are lacking. This paper addresses these gaps by pulling together the issues and solution-ingredients in the BoP from the reviewed literature and comparing these with a large study found in this literature. In addition, through the analysis of the data available in this large study, we extracted some quantitative findings on these issues and solution-ingredients, and identified relationships between them. We have discussed the practical implications of these findings. This study adds to the growing body of literature on the sustainable development at the BoP.

Interdependency between average novelty, individual average novelty, and variety

Idea generation is an important part of the engineering design process, and therefore significant research efforts have focused on developing methods to support designers in generating ideas. A key factor is the measurement of ideation effectiveness. The effectiveness of idea generation methods can be measured using metrics such as novelty, variety, quantity, and quality. Average novelty (AN) of a set of ideas is also used as one of the ideation metrics. However, the interdependency between AN and variety has been given little attention. An investigation of the interdependency between these metrics is important to enhance our understanding of the metrics of ideation, and thereby to develop methods for improving ideation effectiveness. This article examines the interdependency between AN and variety. In addition, the metric ‘individual average novelty (IAN)’ has been introduced, and the interdependency between ‘IAN’ and variety has been investigated.

Design of Product Service Systems at the Base of The Pyramid

The Base of the Pyramid (BoP) consists of about two-fifths of the world population. This population can be categorized as poor with income of less than 2 dollars per day. It is important to alleviate poverty. One of the promising approaches to tackle the wicked problem of poverty is business development combined with poverty alleviation. In this approach, integrated solutions are necessary in order to address the diverse issues in the BoP. These integrated solutions are in the form of product service systems (PSS) rather than the conventional product-oriented or service-oriented solutions. In this paper, we explore different issues that need to be addressed in the PSS design at the BoP. We have also explored strategies used in this PSS design. We have used a case study to explain these issues and strategies. In addition, we have identified salient characteristics of the PSS design at the BoP.

Towards a framework for holistic contextual design for low-resource settings

Healthcare inequality is ubiquitous globally, but the effects are most striking in low-resource settings. In these settings, current methods for the design of medical devices are failing to address specific needs. The associated publications rarely describe how the context was studied at the front-end of design. There is a latent need for a holistic contextual framework for guiding the design decision-making process for devices in these complex contexts. We present results from a systematic literature review and expert interviews that informed the development of a framework for contextualized design for low-resource settings. The contextual factors identified are described and compared for different types of medical devices. This taxonomical framework aims to guide designers towards gaining a better understanding of the context of use when designing products for global challenges in low-resource settings.

Aesthetic design process: Descriptive design research and ways forward

Consumer response to designed products has a profound effect on how products are interpreted, approached and used. Product design is crucial in determining this consumer response. Research in this field has been centered on studying the relationship between product features and subjective responses of users and consumers to those features. The subject of aesthetic or styling design process has been relatively neglected despite the important role of this process in fulfilling intended consumer response through product design. In this paper, we present a review of descriptive design research on aesthetic design process, and highlight limitations of this research. We also suggest opportunities for further descriptive research on the subject of aesthetic design process.

Attributes and Emotions in Product Form Design: A Survey of Professional Industrial Designers

Consumer response to designed products has a significant effect on how products are interpreted, approached and used. Design of products is crucial in determining consumer response and product success. In the form design process, designers may attempt to elicit specific attributes or emotions through the visual appearance products. However, there is little or no knowledge about which attributes or emotions they frequently or rarely attempt to elicit. We carried out a survey with 55 professional industrial designers to identify the attributes and emotions that they attempt to elicit in shaping visual appearance of products. The results indicate that designers frequently or often attempt to elicit some specific attributes and emotions; whereas, they rarely or never attempt to elicit some attributes and emotions.

Design for the BOP and the TOP: Requirements Handling Behaviour of Designers

The base (BOP) and the top (TOP) of the world income pyramid represent the people living in poverty and the people from developed countries, respectively. In the approach of business development combined with poverty alleviation, the design of products for the BOP plays an important role. There is an urgent need to develop an understanding of the process of designing products for the BOP. Requirements handling is an important ingredient of a design process. This research, using a protocol study, examined the differences between the requirements handling behaviour of designers when they design a product for the BOP and TOP markets. We found differences between their requirements handling behaviour in terms of their attention to different topics of requirements, and their handling of solution-specific and solution-neutral requirements.

Design creativity: refined method for novelty assessment

Abstract Novelty is an important characteristic of a creative idea, forming a core component of creativity. Measurement of novelty is therefore essential to assess creativity. We found deficiencies in a frequently cited method of novelty assessment found in the literature. We refine this method by proposing four modifications, supported by drawing on examples of products and ideas. The refined method and the original method are evaluated by benchmarking them against the collective, intuitive assessment of product novelty by experienced designers. The overall achievement of the refined method as presented in this paper is its contribution to a better assessment of product novelty.

Intentions and Inspiration in Shaping Visual Appearance of Products: The Practice of Professional Industrial Designers in India

Abstract Eliciting specific intentions and seeking inspiration are important activities in the process of shaping a product’s visual appearance. A survey of the professional industrial designers was conducted to identify intentions (e.g. attributes, emotions) that they attempt to elicit, and also to identify inspiration sources and their media that they prefer not only in generating ideas to realise intentions but also in analysing and communicating intentions. The findings indicate that the designers frequently intend to elicit some specific attributes and emotions. Regarding inspiration sources and media, commonalities as well as differences were observed in the activities - analysing intentions, communicating intentions, and generating ideas to realise intentions.