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| Selective Laser Sintering (SLS) | Developed by Carl Deckard for his Master’s thesis at the University of Texas, selective laser sintering was patented in 1989. The technique uses a laser beam to selectively fuse powdered materials, such as nylon, elastomer, and metal, into a solid object. Parts are built upon a platform which sits just below the surface in a bin of the heat-fusable powder. A laser traces the pattern of the first layer, sintering it together. The platform is lowered by the height of the next layer and powder is reapplied. This process continues until the part is complete. Excess powder in each layer helps to support the part during the build. | | | | Solid Ground Curing | Developed by Cubital, solid ground curing (SGC) is somewhat similar to stereolithography (SLA) in that both use ultraviolet light to selectively harden photosensitive polymers. Unlike SLA, SGC cures an entire layer at a time. First, photosensitive resin is sprayed on the build platform. Next, the machine develops a photomask (like a stencil) of the layer to be built. This photomask is printed on a glass plate above the build platform using an electrostatic process similar to that found in photocopiers. The mask is then exposed to UV light, which only passes through the transparent portions of the mask to selectively harden the shape of the current layer. After the layer is cured, the machine vacuums up the excess liquid resin and sprays wax in its place to support the model during the build. The top surface is milled flat, and then the process repeats to build the next layer. When the part is complete, it must be de-waxed by immersing it in a solvent bath. SGC machines are quite big and can produce large models. | | | | Stage | One group of concurrently-accomplished tasks, with specified outcomes and deliverables, of the overall product development process.
(relates to Stage-Gate process)
| | | | Stage-Gate process | A widely employed product development process that divides the development effort into distinct time-sequenced stages or phases separated by management decision gates. Product teams must successfully complete a prescribed set of related activities in each stage prior to obtaining management approval to proceed to the next stage of product development. The framework of the Stage-Gate™ process includes work-flow and decision-flow paths and defines the supporting systems and practices necessary to ensure the process’s ongoing smooth operation. | | | | Stereolithography (SLA): | Patented in 1986, stereolithography started the rapid prototyping revolution. The technique builds three-dimensional models from liquid photosensitive polymers that solidify when exposed to ultraviolet light. The model is built upon a platform situated just below the surface in a vat of liquid epoxy or acrylate resin. A low-power highly focused UV laser traces out the first layer, solidifying the model’s cross section while leaving excess areas liquid.
Next, an elevator incrementally lowers the platform into the liquid polymer. A sweeper re-coats the solidified layer with liquid, and the laser traces the second layer atop the first. This process is repeated until the prototype is complete. Afterwards, the solid part is removed from the vat and rinsed clean of excess liquid. Supports are broken off and the model is then placed in an ultraviolet oven for complete curing. Because it was the first technique, stereolithography is regarded as a benchmark by which other technologies are judged. Early stereolithography prototypes were fairly brittle and prone to curing-induced warpage and distortion, but recent modifications have largely corrected these problems. | | | | Strategic business units (Strategische Geschäftseinheiten (SGE)) | A synonym for business units often is business fields (SGF).
A SGE or SGF is a certain product-market combination with the aim of creating or maintaining of success potential. For reasons of reduction of complexity and also in order to assign responsibilities to individual SGEs/SGFs, an enterprise or the products/services of an enterprise are split into part markets and part products within the frame of strategic planning. | | | | Style of creativity | the preferred stable way to produce change (“in what degree are you creative?” / “How does your creativity manifest itself?”); two individuals can be as creative but using different styles. | | | | SWOT | Strengths, Weaknesses, Opportunities, Threats | | |
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