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The Knit on Demand supply chain

Larsson J., Peterson J., Mattila H.

Autex Research Journal

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2012

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Vol. 12, no. 3

67--75

EN

As customers’ tastes become more differentiated, so must companies’ offerings evolve. The demand for variety may soon become unmanageable, and several companies are addressing this trend by adopting a system of mass customization. One project, Knit on Demand, has been conducted by the Swedish School of Textiles in close collaboration with a knitting company and a retailer of tailored fashion in Stockholm. Production and sales of customized products pose logistical challenges for the companies involved, including the one-piece flow through almost the entire supply chain and the demand for short lead times in an otherwise slow environment, adding to the cost of manufacturing mass customized garments. Customization has logistical benefits such as minimised inventory; hence, high inventory turnover and the possibility of fast response to meet customer demand. The Knit on Demand concept can be considered as leagile because it comprises both lean and agile components. It is lean in the manufacturing stage upstream and agile downstream to better respond to customer demand on the market.

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Mass customisation of flat knitted fashion products: simulation of the co-design process

Peterson J., Larsson J., Mujanovic M., Mattila H.

Autex Research Journal

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2011

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Vol. 11, no. 1

6--13

EN

In 1995, the Japanese manufacturer Shima Seiki introduced the first complete garment knitting machine capable of producing a ready-made flat knitted article under the trade name WholeGarment. Recently , the comp any also developed a co-design software tool, Ordermade WholeGarment®, for the customisation of knitted fashion garments. Factory Boutique Shima, their retail shop for on-demand production of customised knitted garments, makes it possible for client s to modify a knitted garment according to personal taste in style, colour , pattern and size. This study examines how such a process streamlines the interaction between customer and shop personnel, while expediting the programming of the knitting machine. In comparing the manual co-design process with the Ordermade WholeGarment® system, we used a computer simulation to analyse the efficiency and lead times of each concept. The case study method was employed with an inductive approach based on company visits and interviews.

3

On inelastic impact and dynamic hardness

Larsson J., Storakers B.

Archives of Mechanics

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2000

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Vol. 52, nr 4-5

779-798

EN

Colinear impact and dynamic hardness is analysed at spherical contact and moderate strains. A consistent three-dimensional contact theory based on viscoplastic material behaviour is laid down involving elements of self-similarity, stationary boundary conditions and cumulative superposition. Universal relations between impact velocity and the resulting contact region, impression depth and duration of impact are derived. Deformed surface shapes are shown to be self-similar for power law material behaviour and their relation to piling-up and sinking-in is explained in detail. The coefficient of restitution at rebound is estimated to first order. The concept of dynamic hardness is not unequivocally defined in general and various definitions in the literature are discussed in relation to true material rate sensitivity. Theoretical and numerical predictions of the present model are compared with pertinent experimental findings for different metals. Particular features such as lip formation, plastic zone size and maximum penetration depth are elucidated.