Abstract My task was to prepare the already designed heating list “Stayhot” for manufacturing. I started with drawing the whole list in the CAD-program. It became obvious that some of the designed components had to be changed to work in practice. A turnable reflector couldn’t be combined with the isolation. The suggested light emitting diodes wouldn’t give enough light, so I cut them out and the problem with light remains to be solved. The old grating had many rods and I changed that to a grating with fewer rods to make it easier to clean. The hanging-up of the grating was also changed. The lower ceasing was changed to be closed towards the reflector to avoid filth and damp. The reflector had a different shape. From having been square it became oval to follow the shape of the above ceasing and have a more even isolation. It also opens up to the possibility to use two heating elements. The heating-source should have been changed to be warmer, but as the new elements didn’t come until my work was almost finished, I couldn’t use it.

Taiwan semiconductor manufacturing industry ranks top in the world for the production and has a great contribution to Taiwan economics. However, the industry produces a significant amount of volatile organic compounds (VOC) into the air. According to EPA of Taiwan, the annual VOC emission amounts from the industry were approximately five thousand tons, a major stationary source of VOC emission. The EPA has implemented the air pollution control regulation for semiconductor industry, in which the VOC emission amount should be below <0.6 kg/hr or the removal efficiency should be >90% for each factory . The conventional control technologies for the VOC emissions was concentration using zeolite followed by thermal oxidation. However, the high boiling points of VOC is difficult to desorbed from zeolite and it required the water to wash the zeolite. This would reduce the removal efficiency of zeolite. This control processes have high operation cost and may produce byproducts required for further treatment. Advanced chemical oxidation process (AOP) recently has gained tremendous attention as an emerging control technology of VOC due to low treatment cost and few oxidation byproducts. The major oxidant of the technology is believed to be hydroxyl radicals, which can react organic compounds at very reaction rates. A majority of VOC emissions from the semiconductor industry are highly soluble and can be easily dissolved into water by scrubbing process. However, the wet scrubbing process can produce a significant amount of wastewater. The objective of this study was to investigate the feasibility of using wet scrubber and O3/H2O2/catalyst process on controlling the VOC emissions from the semiconductor manufacturing industry. A full scale of process of 1000 CMM flowrate was designed and built along with a semiconductor packaging facility. Results showed that major compounds of the VOC exhaust were iso-propanol, PGMEA, PGME and methyl ethyl keton. The inlet concentrations of THC significantly varied from 50 to 600 ppmv as methane. The AOP process can removed 90-95% of VOCs and the scrubbing water can be recycled and reused at least 95%. The capital cost of the system was NT20,000,000 with the annual operation cost of NT120,000 which was only 36-40% of it for the concentration using zeolite followed by thermal oxidation.

An assembly line that procures raw materials from outside suppliers and processes the materials into finished products is considered in this research. An ordering policy is proposed for raw materials to meet the requirement of a production facility, which, in turn, must deliver finish products in a fixed quantity at a fixed time interval to the outside buyers. Two different types of raw materials, unfinished and ready-to-use, are procured for the manufacturing system. The unfinished raw materials are turned into processed raw materials after preprocessing. In the assembly line, the processed raw materials and the ready raw materials are assembled to convert into the final products. A cost model is developed to aggregate the total costs of raw materials, Work-in-process, and finished goods inventory. Based on the product design and manufacturing requirement a relationship is established between the raw materials and the finished products at different stages of production. A non-linear integer-programming model is developed to determine the optimal ordering policies for procurement of raw materials, and shipment of assembly product, which ultimately minimize the total costs of the model. Numerical examples are presented to demonstrate the solution technique. Sensitivity analysis is performed to show the effects of the parameters on the total cost model. Future research direction is suggested for further improvement of the existing results.

In an imperfect manufacturing process, the defective items are produced with finished goods. Rework process is necessary to convert those defectives into finished goods. As the system is not perfect, some scrap is produced during this process of rework. In this research, inventory models for a single-stage production process are developed where defective items are produced and reworked, where scrap is produced, detected and discarded during the rework. Two policies of rework processes are considered (a) First policy: rework is done within the cycle, and (b) Second policy: rework is done after N cycles of normal production. Also, three types of scrap production and detection methods are considered for each policy, such as (i) scrap is detected before rework, (ii) scrap is detected during rework and (iii) scrap is detected after rework. Based on these inventory situations, the total cost functions for a single-stage imperfect manufacturing system are developed to find the optimum operational policy. Some numerical examples are provided to validate the model and a sensitivity analysis is carried out with respect to different parameters used to develop the model.

<p>This report summarizes a Bachelor Degree Project in Integrated Product Development,carried out during the spring semester in 2007 by three students at the Product Design Engineering programme at the University of Skövde. The project was performed as an assignment for KinBag ab, a sister subsidiary to Kinnegrip ab in Lidköping, who develop,manufacture and market the golf bag KinBag, a bag with an integrated wheel carriage system. The purpose of the project was to redesign the golf bag to attract a target group consisting of golfers aged between 20 and 40.</p><p>The layout of the project was as follows: The project began with a feasibility study where different problems were identified with the basis of a market research which eventually was summarized in a dynamic specification of requirements. The feasibility study was followed by a generation of ideas which contained everything from sketches to simple mock-ups with an intensive amount of thoughtful brainwork and information gathering in between. This led</p><p>to the development of a number of design concepts, both on an overall level and on different parts of the golf bag. Even more detailed models were created and visualized in a three dimensional environment by means of a CAD program.</p><p>The report portrays the product design process and methods utilized in the project, as well as the final result - a full-scale operational prototype of the new generation of KinBag.</p>

<p>Denna rapport är ett resultat av den expansionsfas Söderhamn Eriksson AB i Mariannelund befinner sig i idag. De ökade kraven som ställs på tillverkningsföretag såsom SEMAB/Remill har gjort att kontakt tagits med studenter på Tekniska Högskolan i Jönköping. Den uppgift studenterna stått inför är att analysera och ge förslag, som kan förbättra materialflödet inom verksamheten i Mariannelund.</p><p>Målet med detta projekt är att förbättra och effektivisera nuvarande materialflöde hos SEMAB/Remill. För att uppnå detta mål ges förslag på en ny, fristående enhet för bearbetning av råmaterialet. Layoutförslag och vilka krav som kommer att ställas på en sådan enhet beskrivs och diskuteras. Hur verksamheten skulle kunna förbättras om situationen som råder idag behålls diskuteras vidare i rapporten.</p><p>Studier hos de två befintliga produktionsenheterna har gjorts i olika former. De metodiker som använts är nulägesbeskrivning, kartläggning av materialflöden, intervjuer och en undersökning av servicegraden in till den bearbetning (svetsning eller skärande bearbetning) som följer efter att råmaterialet kapats eller skurits.</p><p>Förseningsundersökningen som gjordes på de två produktionsenheterna gav resultatet att SEMAB hade försening på 20 % av materialet, medan Remill hade 12 % försening på sitt material. På grund av kort undersökningsperiod och något lugnare produktionstakt gav inte denna undersökning den förmodade graden av förseningar som upplevs av personer inom organisationen.</p><p>Resultatet av de analyser och förslag som kommit fram vid intervjuerna har framställts i en ny layout med placering på Remillfastigheten, samt förslag på alternativ placering. Hur företaget skulle kunna förbättra produktiviteten med förbättringsarbete är en annan del av huvudtyngdpunkten i resultatet.</p><p>I diskussionen behandlas de förslag som givits vidare. Fördelar vägs mot nackdelar och alternativ till var en ny enhet skulle kunna vara placerad ges. Ledarskapet är en viktig del vid förbättringsarbete som beskrivs och diskuteras vidare. Förslag som kommit från medarbetare, men inte bearbetats vidare reflekteras i diskussionen.</p><p>Slutsatsen av de analyser och intervjuer som gjorts är att det föreligger problem med materialhanteringen inom verksamheten. Att något måste göras för att förbättra produktiviteten förefaller därför som en självklarhet.</p><p>För att förenkla för läsaren att visuellt skapa sig en bild av hur det ser ut hos SEMAB och Remill har bilagor framställts på layouter och placeringen av de olika enheterna, dels som bilagor sist i rapporten, men även löpande i rapporten.</p>

<p>The object of this examination project is to produce a method of work sampling at Rapid Granulator AB. The aim is to perform the method at the company and evaluate if it is executable. The study is delimited to the basic construction of the 45-series in the assembly hall.</p><p>Preparations to produce the method of the work sampling resulted in definitions of activities, a form and a product tree. Several days were spent studying the assembling to learn and understand the entirety.</p><p>The work sampling result showed a large amount of no value adding time that was used in the assembling. Some of the activities could be reduced and we observed some problems during the assembly process. These problems were noted and are presented to enlighten the company, together with some suggests of changes, with the purpose to reduce the time of the assembly cycle and increase the productivity.</p><p>Conclusions of the results of the work sampling are discussed at the end.</p><p>A large amount of tables and charts, connected to preparations and results, is to be found in the appendix.</p>

<p>Any way of making the manufacturing industry more efficient is always of great interest due to the contribution of manufacturing to the society. A major asset within manufacturing is information about manufacturing systems, as a base when making decisions. The most essential information within manufac-turing industry would be the manufacturing systems capability information. That information would include information about the resource, used process and produced product. Although important, manufacturing systems capability models are rare, and the information seems to be challenging to model.</p><p>The purpose of this thesis is to model manufacturing systems capability with focus on the machining industry.</p><p>In order to model manufacturing system capability, existing information standards has been used as a frame of reference. Some information standards have been evaluated on industrial cases and sometimes modified to serve a specific purpose. The information standards have been evaluated to first separately represent product, process and resource. Thereafter have the infor-mation standards been evaluated to represent all three domains together.</p><p>ISO10303-214 (AP214) has been modified and evaluated to represent any process within manufacturing. The state of the product and the state of used manufacturing system are described and connected to every relevant process step.</p><p>AP214 with ISO10303-224 (AP224) has been used together with a developed method, to describe manufacturing system capability within machining. Within the limitations of AP224 geometrical feature description, the capability of a manufacturing system can be defined and connected to a product description. Using similar feature based description for the capability and the product description, products manufacturability can be evaluated.</p><p>Also ISO14649 and ISO10303-238, both also known as STEP-NC, are treated in this thesis as enablers to describe manufacturing system capability. STEP-NC is shown to describe manufacturing systems within machining where the product, process and resource are collectively described. In order to describe capability and evaluate products manufacturability, STEP-NC has to be extended from describing/modelling one configuration of a manufacturing system to describe a set of configurations.</p>

<p>Today’s industries face an increasing global competition. Decision makers have to deal with different kinds of uncertainty, a complex business ecosystem, a high pace of change, and an unforgiving market when less than best decisions are made. One, among many others, approach that can lead to these better decisions is to have a strategy.</p><p>The objective of this research is:</p><p>“<i>To design a model that supports the formulation of product strategy and manufacturing strategy in accordance to each other and thereby facilitate and encourage continuous communication and collaboration between product development and manufacturing system development.”</i></p><p>To help meet the objective, three chapters of frame of reference are presented; Strategy, development processes and design for X. The frame of reference together with discussions in industry (ITT Flygt) has in an iterative manner lead to a suggested model that supports the formulation of product strategy and manufacturing strategy.</p><p>Future research will improve, evaluate and validate both the usability of the model and the results from using it in practise. A method for using the model will be developed.</p><p>The research project presented in this licentiate thesis is one of seven parallel research projects with a shared objective – to develop systematic working procedures, a generic decision model and decision sub models that support the practical design of a workshop that supports the business strategy of the company.</p>

<p>The use of Phase Change Material, PCM, to change the thermal inertia of lightweight buildings is investigated in the CRAFT project C-TIDE. It is a joint project with Italian and Swedish partners, representing both industry and research. PCMs are materials where the phase change enthalpy can be used for thermal storage. The Swedish application is a night ventilation system where cold night air is used to solidify the PCM. The PCM is melted in the day with warm indoor air and thereby the indoor air is cooled. The system is intended for light weight buildings with an overproduction of heat during daytime. In the thesis, the results of experiments and numerical simulations of the application are presented. The theoretical background in order design the heat exchanger and applying the installation in thermal simulation software is presented. An extensive program is set up, in order to develop test methods and carry tests to evaluate the performance over time of the PCM. Testing procedures are set up according to ISO standards concerning service life testing. The tests are focused on the change over time of the Thermal Storage Capacity (TSC) in different temperature spans. Measurements are carried out on large samples with a water bath calorimeter. The service life estimation of a material is based on the performance of one or more critical properties over time. When the performances of these properties are below the performance requirements, the material has reached its service life. The critical properties of the PCM are evaluated by simulation of the application. The performance requirements of the material are set up according to general requirements of PCM and requirements according to building legislation. The critical properties of a PCM are the transition temperature, the melting temperature range and the TSC in the operative temperature interval. The critical property of the application is its energy efficiency.</p><p>The results of the study show that the night cooling system will lower the indoor air temperature during daytime. It also shows that the tested PCM does not have a clear phase change, but an increased specific heat in the operative temperature interval. Increasing the amount of material, used in the application, can compensate this. Finally, the tested PCM is thermally stable and the service life of the product is within the range of the design lives of the building services. It is essential to for all designers to know the performance over time of the properties of PCMs. Therefore it is desirable that standardized testing methods of PCM are established and standardized classification systems of PCMs are developed.</p>