This lecture focuses on approaches that change the way of working with material at different stages of its existence — from design and production to repeated use and rethinking already created products. Central attention is on design and project-technological decisions that reduce the formation of textile waste at the beginning of production. Zero-waste design works mainly at the design stage, optimizing material efficiency, while upcycling and life cycle extension practices allow materials to return to circulation after use without destruction.

Goal of the lecture
The goal is to form an integral understanding of how design and technological decisions affect the volume of textile waste. Special emphasis is on the design stage as a key point in preventing material losses. Zero-waste design, upcycling, and life cycle extension are presented as practical tools for sustainable production.

Planned learning outcomes
The lecture reveals the connection between design decisions and material flows. Principles of zero-waste design and upcycling, the value of repair culture, and extending product life cycles are analyzed. The role of designers and technologists is highlighted, including practical Ukrainian and European case studies.

Lecture structure
The lecture follows a cause-to-effect logic: design as a tool for material flow management, causes of waste formation at the design stage, principles of zero-waste design, upcycling, life cycle extension, role of specialists, connection with the circular economy, and practical cases.

Design as a tool for material flow management
Significant losses occur at the product design stage. Design determines part shapes, material composition, connection methods, disassembly possibilities, and reuse potential. In sustainable production, design becomes a mechanism for managing material flows. European slow fashion brands exemplify design based on available materials rather than abstract concepts; similar approaches are increasingly used in Ukraine.

Causes of waste formation at the design stage
Main causes include complex part shapes, ignoring fabric width, inefficient pattern orientation, use of mixed materials without considering processing, and lack of unification of parts. Technology alone cannot solve these issues; design logic must change, which is why zero-waste approaches arise as an engineering response.

Zero-waste design principles: the essence
Zero-waste design maximizes material use and minimizes waste. Product shape, part design, and layout are developed simultaneously. Principles include combining constructive and decorative elements, using geometric shapes, integrating small details into larger ones, adapting to standard fabric widths, and unifying details.

Zero-waste design: practical embodiment
Practical techniques include combining decorative and constructive elements, geometric shapes fitting the fabric, and integrating small details into layouts to minimize trimmings. Adapting designs to fabric width and unifying details allows reuse across products. Example: Ukrainian project Re:Inventex processes pre-production and post-consumer textile waste, creating secondary raw materials and regenerated fibers for further industrial use.

Upcycling as a design and technology approach
Upcycling retains the material’s structure, properties, and functional history. Designers work with limited, pre-formed resources, forming products that adapt to the material. This avoids energy-intensive processes like grinding or dissolving, reducing costs and preserving functional value. Upcycling applies to pre-production leftovers, post-consumer clothing, and small-scale or designer products.

Upcycling: Ukrainian examples
KSENIASCHNAIDER uses vintage denim, creating unique, high-end products and recycling about 500 pairs of jeans monthly. 3.14BAN transforms advertising banners into clothing and accessories, focusing on redesign based on material limitations, turning constraints into design advantages. Both examples show materials are reused with added value, integrating design, technology, and organized processes.

Extension of textile product life cycle
Life cycle extension reduces ecological impact by prolonging product use, decreasing the need for new production. Focus is on maintainability, adaptability to conditions, and service models where repair and maintenance become standard practices. This systemic approach combines design, construction, operation, and service with zero-waste design and upcycling to reduce waste throughout production and use.

Practices for lengthening the life cycle
Key practices include repair models (e.g., Nudie Jeans), upcycling (e.g., 3.14BAN), and industrial recycling (e.g., Re:Inventex). All extend material life, reduce primary raw material use, and decrease textile waste volumes.

The role of designers and technologists
Designers and technologists are responsible for managing material resources throughout the product life cycle. Decisions at the design stage affect repairability, material compatibility, and future reusability. Coordinated design, technological, and organizational decisions create stable sustainable production models.

Connection of zero-waste approaches with circular economy
Zero-waste design, upcycling, and life cycle extension prevent waste formation at the design stage, reducing complexity of material flows and improving uniformity for circular processes. These approaches enhance the efficiency of sorting and recycling, making the circular economy a continuous, preventive logic rather than a final-stage process.

Transition to conclusions
Comparative analysis of upcycling, repair models, and recycling shows different levels of system operation but a common goal: reducing primary raw material use and textile waste volumes. Lengthening material life cycles is implemented through complementary tools.

Conclusions
Reducing textile waste and extending material life cycles depends primarily on the design stage. Zero-waste design, upcycling, and life cycle extension transform design into a tool for managing material flows, ensuring materials are reusable or recyclable rather than becoming unmanageable waste. Ukrainian and European examples demonstrate successful implementation through systemic, resource-focused approaches.

Completion
The sustainable development of the textile industry depends on integrating design, technological, and organizational solutions from the start of production. Thank you for your attention!