Smart Clothing, the convergent future of the electronics and clothing industries, struggles to reach its true potential and enter the mass market because of 1) imbalanced contributions from the electronics and clothing sectors, 2) the lack of an integrated approach to optimise the input from the different areas, and 3) the unclear direction of the products. There is a need for an NPD process that balances all contributions and addresses new values based on user requirements. Moreover, a strategic approach, that challenges the development teams to go beyond their existing creative boundary and reconciles their differences, is required. According to the research, Smart Clothes should take the design approach of functional clothing and focus on the area of sportswear, personal healthcare and physical monitoring, as they fit the users’ lifestyle and requirements. Since social acceptance is an important factor, Smart Clothes must also have a good design and whilst, at the same time, perform all the basic functions that ordinary garments do. They should allow the user to personalise the styles and functions according to the benefits, with respect to product lifecycle and disassembly. A conceptual model of the NPD process was developed and tested with experts in this field. The proposed model provides the basis for a computer software to plan and manage product development teams and activities at the front-end of the NPD process. It offers several advantages: 1. Combining the NPD models and those of collaborative development 2. Providing a holistic view of Smart Clothing development 3. Clarifying of the roles of all participants within the collaborative development teams 4. Describing the responsibilities and expected contributions of all participants 5. Explaining working relationships and overlapping roles and responsibilities 6. Offering the directions for the creative boundary extension

Smart clothing is far from being adopted by regular consumers and worn on a regular basis. Most developments can be found in specialized markets and all of the few consumer products so far have not been commercially successful. The first part of this thesis illustrates why this is the case and presents a few examples of concepts that show the potential of smart clothing in an everyday context.The second part shows my own practical research into the subject and the resulting design concept. It follows a user-centered design process with participatory design elements and ends in a concept proposing clothing that can change color and style on the go. The concept tries to support a sustainable lifestyle by slowing down fast fashion and democratizing fashion design. It makes it easy for the wearer to create her own styles and to change the style on the go to adjust to different situations or different moods. The end result of this thesis is a prototype that serves as a proof-of-concept.

Various studies have taken different approaches to persuade users into adopting a healthy sitting posture. In addition to the sedentary lifestyles we have come to adopt, the importance and reasoning of these studies stem from the adverse effects of poor posture on our health and mood. However, studies approaching this area with real-time visual modality integrated into clothing are rather sparse. Utilizing this integration might potentially fulfill the requirements of the ubiquitous computing era and inform the users in a calmer way. To evaluate various aspects of this concept, a mid-fidelity prototype was developed and tested with users. Semi-structured interviews were then conducted to obtain their thoughts and opinions on such an approach. In addition to the approval of the concept, further concerns, advantages and disadvantages were disclosed, and used to inform a design space for similar concepts. Although requiring more research, the results of this study outline a primary design space consisting of essential characteristics one needs to be aware of when designing a similar concept.

Measurement of accurate tidal volumes based on respiration-induced surface movements of the upper body would be valuable in clinical and sports monitoring applications, but most current methods lack the precision, ease of use, or cost effectiveness required for wide-scale uptake. In this paper, the theoretical ability of different sensors, such as inertial measurement units, strain gauges, or circumference measurement devices to determine tidal volumes were investigated, scrutinised and evaluated. Sixteen subjects performed different breathing patterns of different tidal volumes, while using a motion capture system to record surface motions and a spirometer as a reference to obtain tidal volumes. Subsequently, the motion-capture data were used to determine upper-body circumferences, tilt angles, distance changes, movements and accelerations-such data could potentially be measured using optical encoders, inertial measurement units, or strain gauges. From these parameters, the measurement range and correlation with the volume signal of the spirometer were determined. The highest correlations were found between the spirometer volume and upper body circumferences; surface deflection was also well correlated, while accelerations carried minor respiratory information. The ranges of thorax motion parameters measurable with common sensors and the values and correlations to respiratory volume are presented. This article thus provides a novel tool for sensor selection for a smart shirt analysis of respiration.