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Kriterier för automation vid inlagring : Ett beslutsunderlag i valet av artikelplacering / Criteria for automation during the put away process.Svensson, Simon, Wadsten, Adam January 2019 (has links)
The role of warehouse in the value stream, plays a significant part in how well a company can satisfy the requirements of a customer. To be able to support the demand of the customers, production companies are forced to produce a bigger variety of models in the product range, which results in an increasing assortment. With an effective stock keeping, there is a potential to reduce waste and increase profitability. In the choice of warehouse-design, warehouse-operations have the opportunity of choosing between a number of different designs containing manual and automated put away.It has become common that companies are choosing a combination of automated and manual processes. With this combination of processes, the companies are faced with choices about stock locations. With the help of well developed criterias about stock locations, there is a potential to achieve a more effective put away. The purpose of the study has been formulated as ”Investigate when automation in warehouse management makes the put away process in a central warehouse more efficient”. Through a case study on a warehouse, located in Nässjö, this report will answer the research questions regarding which of the manual and automated put away processes to use. The research questions are: Which criteria affect the decision of automated or manual put away? Based on the criteria that are raised in research question 1, when is it more efficient to store carton in AS/RS in comparison with manual picking with truck in pallet racking? The research questions wish to lift criteria as a basis for decision making and when it is more effective to use automated put away. The warehouse that this study is based on is using both automated and manual materials handling. The specific automation system that has been the basis for this study’s result is AutoStore. This report has a qualitative approach, the methods that has been used for collecting data are interviews, observations and document studies. Dimension, process time and utilization were the three criteria that are presented in the result. Based on the pallets limit of space in the automated system, the dimension of the article is the first criteria. In addition to the article’s measurements, the articles shape and material of the package had an impact if the article would fit in the load carrier. The two put away processes include different operations that differ in how long they take to execute, which has an impact on the company's efficiency. One reason for the time consuming difference, turned out to be how the quantity affects the time for put away in AutoStore comparing with the constant time for manual put away. A time consuming operation in the process with AutoStore was the one with repacking for the systems pallet. The operation also turned out to affect the utilization rate, due to its measurement of a pallets fill rate. The quantity of put away in combination with the dimensions of the article, affects the total utilization rate. With the result, the aim of the study is to contribute to companies that contains a combination of warehouse-design with a basis for the decision making about stock locations.
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En kvalitativ studie om betydelsen av intern kommunikation och informationsflöde : En undersökning om hur dessa faktorer kan effektivisera inlagringsprocessen hos ett distribuerande företag / A qualitative study on the importance of internal communication and information flow : An investigation into how these factors can streamline the filing process of a distribution companyRostamian Shirazi Nejad, Behzad, Olivares Muñoz, Daniel January 2018 (has links)
Syfte – Studiens syfte är att undersöka hur den interna kommunikationen och informationsflödet kan effektiviseras på ett fallföretags inlagring. För att uppfylla syftet har följande tre frågeställningar besvarats: 1. Hur ser det interna kommunikations- och informationsflödet ut i en inlagringsprocess hos ett distributionslager? 2. Vilka begränsningar i det interna kommunikations- och informationsflödet kan påverka inlagringsprocessens effektivitet? 3. Hur kan en effektivare intern kommunikations- och informationsflöde förbättra inlagringsprocessen i ett distributionslager? Metod – För att uppfylla syftet genomfördes en fallstudie på ett distributionsföretag. Genom intervjuer och observationer har det samlats in empiriska data. Den empiriska data med stöd av det teoretiska ramverket, har sedan bidragit till att uppnå syftet. Resultat – Först identifierades hur den nuvarande kommunikationen och informationsflödet ser ut och vilka begränsningar som existerar. Utifrån begränsningarna har det sedan utformats möjliga åtgärdsförslag som kan effektivisera fallföretagets interna kommunikation och informationsflöde, för att på så sätt effektivisera arbetet. Implikationer – Studiens resultat avser att bidra till att effektivisera ett företags interna kommunikation och informationsflöde. Uppstår begränsningar inom området ska de åtgärdsförslag som formulerades bidra till att minska kommunikationsbristerna. Begränsningar – Det har enbart samlats in data från de som berörs av inlagringsprocessen. Därmed vet inte författarna hur det ser ut på de andra områdena och i hur stor utsträckning de påverkas av inlagringen. Intervjuer har heller inte kunnat utföras på lagermedarbetare som har hand om lossningen på grund av tidsbrist och språkbegränsningar. De påverkar också inlagringsprocessen och det hade varit intressant att även få deras synpunkter. / Purpose – The purpose of the study is to investigate how the internal communication and information flow can be improved in the case company’s inbound process. To fulfil the purpose, the following three questions have been answered: 1. How does the internal communication and information flow look like in the inbound process of a distribution warehouse? 2. What restrictions in the internal communication and information flow can affect the efficiency of the inbound process? 3. How can a more effective internal communication and information flow improve the inbound process of a distribution warehouse? Method – In order to fulfil the purpose, a case study was conducted at a distribution company. Empirical data was collected through interviews and observations. The empirical data supported by the theoretical framework, helped achieve the purpose. Findings – How the current communication and information flow looks like and what constraints exists was identified first. Based on the constraints that were identified, viable solutions were proposed that can improve the internal communication and information flow of the case company. Implications – The study’s results are intended to help improve a company’s internal communication and information flow. If limitations occur in a company, the proposed measures can help reduce existing communication shortages. Limitations – Data was only collected from those who are involved in the inbound process. Thereby, the authors do not know how it looks like in the other areas and to what extent they are affected by the inbound process. Interviews was also not possible to conduct on warehouse workers who handle the unloading due to time shortages and language constraints. They also affect and are affected by the inbound process, so it would have been interesting to also get their views.
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Enhancing Mineral Carbonation of Olivine with CO2 / Förbättring av mineral kolsyrning av olivin med CO2Altantzis, Ikaros January 2023 (has links)
Koldioxidutsläpp (CO2) från energiproduktionsindustrin och transportsektorn globalt påverkar miljön negativt. Länder har enats om att minska utsläppen för att nå målet om en genomsnittlig temperaturökning på 1,5 °C till 2030. Trots detta förväntas de globala utsläppen av CO2 från fossila bränslen och industriella processer vara cirka 40 Gton per år fram till 2100. För att dra nytta av CO2-utsläppen och skapa värdefulla produkter med negativa utsläpp är mineralkarbonatisering en önskvärd process. Denna process innebär att CO2 och mineraler löses upp i en alkalisk lösning och bildar stabila produkter. Faktorer som partikelstorlek hos mineralerna och CO2-lösningshastigheten påverkar mineralkarbonatiseringens hastighet. Experiment utfördes med en batchreaktor från Paebbl AB och en matematisk modell utvecklades i Matlab. Resultaten jämfördes för olika partikelstorlekar i tre motståndsfall. Större partikelstorlek hos olivin visade sig öka tiden för total konvertering, oavsett motståndstyp. De modellerade motstånden beskrev inte tillräckligt processen och indikerade att alla tre motstånd har en samtidig och enhetlig effekt på olivinmineralisering, utöver eventuella begränsningar som föroreningar och biprodukter. Mineraliseringsexperiment med 20 μm partiklar under en timme gav 34,4% omvandling, medan 10 μm partiklar under två timmar gav 46,7% omvandling. En inledande undersökning av massöverföringsbegränsningar visade att CO2-lösningshastigheten inte är den begränsande faktorn, utan lägre omrörningshastigheter och beteendet hos (CO2 + olivin)-systemet behöver ytterligare studeras. Framtida forskning bör fokusera på att lösa dessa begränsningar. / Carbon dioxide (CO2) emissions from the energy production industry and the transportation sector globally negatively affect the environment. A prominent example is the interconnection of carbon with the greenhouse effect. Countries have agreed to mitigate their emissions and try to fulfill the target of 1.5 oC average temperature increase by 2030, but in order to do so the global emissions of CO2 from fossil fuels and industrial processes will still lead up to the astonishing amount of 40 Gtons of CO2 each year until 2100. It is apparent that processes that try to take advantage of the emitted CO2 creating valuable products with negative emissions are highly desired. One of these is mineral carbonation, where CO2 and minerals dissolve in an alkaline solution and form stable products. Many factors affect the rate at which mineral carbonation happens. The effect of the particle size of the mineral in the process will be investigated, along the CO2 dissolution rate through the overall gas-liquid mass transfer coefficient (kLa), in order to get a better understanding of the process. Experiments were conducted with a batch reactor provided by Paebbl AB and a mathematical model was developed in Matlab. The experimental and numerical results, in regards to the particle size, were then compared for the cases of three resistances. This model can be developed further for use in a continuous mineralization process. The results revealed that increasing the particle size of olivine leads to a significant increase in the time required for total conversion, irrespective of the resistance type. The modelled resistances were found to inadequately describe the process, suggesting a simultaneous and uniform effect of all three resistances on olivine mineralization, in addition to the effect of other possible limitations such as impurities and by-products. Mineralization experiments with 20μm particles and a duration of 1 hour led to 34.4% conversion, whereas experiments with 10μm particles and a duration of 2 hours resulted in 46.7% conversion. Finally, the initial investigation of the mass transfer limitations in a system of CO2 and water led to an average kLa coefficient of 191 h-1, suggesting that the CO2 dissolution rate is not the limiting factor. However, the impact of lower stirring rates remains unexplored due to the absence of appropriate instrumentation and the behaviour of the (CO2 + olivine) system should also be studied. Future research should aim to address these limitations.
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