No description available.

Kundanpassade produkter är produkter som utformas och tillverkas för att möta enskilda kunders specifika behov. Speciellt inom fordonsindustrin är ökad kundanpassning ett förekommande fenomen eftersom tillverkning av kundanpassade fordon kan generera större intäkter. Till följd av detta ökar dock antalet artikelnummer som förvaras och hanteras i fabrikerna för att kunna tillverka just-in-time. Samtliga artikelnummer ska finnas tillgängliga i rätt kvantitet och på rätt plats vid rätt tillfälle för att undvika produktionsstopp och extra kostnader. Volvo Tuve är en lastbilstillverkande fabrik med hög grad av kundanpassning. Inom tio år förväntas antalet artikelnummer dubblas. Ökningen av artikelnummer innebär en logistisk utmaning, då fabrikens nuvarande lager saknar kapacitet för att förvara och hantera alla artikelnummer. Framför allt gäller det material som förvaras i små blå lådor. Denna studie ämnar utvärdera olika lagerlösningar för små material i lådor och rekommendera en framtida lagerlösning för Volvo Tuves materialhantering av dessa som kan möjliggöra framtida ökning av antal artikelnummer. Utifrån litteratur inom olika typer av lagerlösningar identifierades tre olika scenarion som kunde vara lämpliga att implementera i Tuvefabriken. Scenariona testades sedan empiriskt för att utvärdera vilket som var mest lämpligt för det undersökta fallet. Detta innebär att studien är deduktivt genomförd. Scenariona utvärderades genom två dimensioner; behovsuppfyllnad och löpande kostnader. Det optimala scenariot skulle tillgodose flest viktiga behov inom fabriken till en så låg löpande kostnad som möjligt. Scenario 1 innebär ett centraliserat automatiserat lager som är placerat ungefär lika långt bort från fabrikens interna kunder. Scenario 2 innebär en semi-decentraliserad lagerlösning med två automatiserade lager som försörjer olika områden av fabriken. Scenario 3 innebär en helt decentraliserad lagerlösning med fyra manuella lager som försörjer varsitt område i fabriken. Genom en workshop med logistikingenjörer från andra Volvofabriker identifierades de aktiviteter och behov som lagerlösningen bör tillgodose. De olika behovens viktighet graderades sedan genom en enkät som distribuerades till logistikingenjörer på Volvo Tuve. Genom jämförelse med litteratur graderades även varje scenarios möjlighet till att uppfylla varje enskilda behov. Weighted Point Method nyttjades sedan för att ge varje scenario ett summerat viktat betyg för hur väl de kan tillgodose de viktigaste behoven. Resultaten visade att scenario 1 och 2 var bäst lämpade för att uppfylla de viktigaste behoven medan scenario 3 var något sämre. För att beräkna skillnaden i löpande kostnader mellan de olika scenariona genomfördes en dokumentstudie för att samla relevant data. Personalkostnader, transportkostnader samt kostnad för yta beräknades sedan på årsbasis för samtliga scenarion. Resultaten visade att scenario 1 innebar lägst löpande kostnader, tätt följt av scenario 2 medan scenario 3 innebar mycket högre löpande kostnader. En intervju genomfördes för att undersöka Volvos prioritering av behov repsektive löpande kostnader. Därefter kunde det fastställas att scenario 1 borde rekommenderas eftersom det kunde uppfylla de viktigaste behoven till lägst löpande kostnad och dessutom sannolikt innebär lägre investeringskostnad än scenario 2. Det innebär att ett centraliserat, automatiserat lager bör implementeras i fabriken. / Customized products are products that are designed and manufactured to meet the specific needs of individual customers. Especially in the automotive industry, increased customization is common as the production of customized vehicles can generate more revenue. However, as a result, the number of part numbers stored and managed in factories to enable just-in-time manufacturing is increasing. All part numbers must be available in the right quantity and in the right place at the right time to avoid production stops and extra costs. Volvo Tuve is a truck manufacturing plant with a high degree of customization. Within ten years the amount of part numbers handled in the plant is expected to double. The increase in part numbers poses a logistical challenge, as the factory's current warehouse lacks the capacity to store and handle all part numbers. This is especially true for materials stored in small blue boxes. This study aims to evaluate different storage solutions for small materials in boxes and recommend a future storage solution for Volvo Tuve's material handling of these that can enable future increases in the number of part numbers. Based on literature regarding different types of warehouse solutions, three different scenarios were identified that could be suitable for implementation in the Tuve factory. The scenarios were then tested empirically to evaluate which one was most suitable for the case under investigation. This means that the study is deductively conducted. The scenarios were evaluated through two dimensions; need fulfillment and running costs. The optimal scenario would fulfill the most important needs within the factory at the lowest possible running cost. Scenario 1 entails a centralized automated warehouse located approximately equidistant from the factory's internal customers. Scenario 2 consists of a semi-decentralized warehouse solution with two automated warehouses supplying different areas of the factory. Scenario 3 is a fully decentralized warehouse solution with four manual warehouses, each serving a different area of the factory. In a workshop with logistics engineers from other Volvo factories, the activities and needs that the warehouse solution should meet were identified. The importance of the different needs was then graded through a survey distributed to logistics engineers at Volvo Tuve. By comparison with literature, the ability of each scenario to meet each individual need was also graded. The Weighted Point Method was then used to give each scenario a total weighted score for how well they can meet the most important needs. The results showed that scenarios 1 and 2 were best suited to meet the most important needs while scenario 3 was slightly worse. In order to calculate the difference in running costs between the different scenarios, a document study was carried out to gather relevant data. Personnel, transportation and space costs were then calculated on an annual basis for all scenarios. The results showed that scenario 1 had the lowest running costs, closely followed by scenario 2, while scenario 3 had much higher running costs. An interview was conducted to investigate Volvo's prioritization of needs versus running costs. It was then determined that scenario 1 should be recommended as it could meet the most important needs at the lowest running costs and is also likely to involve lower investment costs than scenario 2. This means that a centralized, automated warehouse should be implemented in the factory.

Färggrossen is a warehousing company that was established in 1976. The company has over 400 customers ranging across mid and south Sweden; it stores 5,000 different types of products such as paints, wallpapers, chemicals and tools which are used for painting. Since its establishment, the company has not changed how it manages its warehouse. Decisions are based on the warehouse manager’s personal memory and decisions, and this method worked sufficiently well until the company was bought by Mikael Lindgren in September 2008. Lindgren, the CEO, believed that the company had more potential, which is why the company has eagerly started to make changes in order to improve the warehouse operations as well as to reach its full potential. This thesis is to guide the company to reach this goal. At our first meeting with Färggrossen, improvements regarding different processes as well as the warehouse layout were identified. As a first step, a literature study was conducted in order to gain deeper insight and understanding about warehouse layouts; also we benefited from studying literature regarding different warehouse aspects from a system perspective: inputs, processes and outputs. Subsequent to the literature study, we identified those thesis research questions which needed to be answered in order to improve the warehouse management at Färggrossen. The next step was to decide which methods should be used in order to answer these questions. After researching different methodology options, a meeting with Färggrossen and our supervisor Bengt Ekdahl took place where we, together, decided to use the multiple case study method. Färggrossen suggested that we study two other companies, BSAB and ECO; according to them, these companies had similar warehouses. To be able to benchmark three companies, we needed to understand the warehousing management systems of all three companies, which is why we conducted our interviews. Once we finished gathering the required data, we defined the three companies’ activities in a manner to correspond with the terminology which is used in the literature.  In the analysis chapter we compared the three companies, and also used the information from the literature in order to provide Färggrossen with recommendations on how to improve the warehouse processes and layout. These are categorised as main, secondary and future recommendations; the main recommendations are the most important and inexpensive to implement, which is why we strongly suggest that they are prioritized. The two most important recommendations to improve the outputs of the warehouse system are implementing a serialized locater addressing system and defining a bulk area to support the replenishment process. These particular modifications will improve the overall efficiency of the warehouse system as well as the product availability and the customer satisfaction. The overall efficiency of the warehouse system will be further improved by eliminating manual labour as much as possible and combining the inspections whih are done in the receiving process with the putaway process. The product condition will be improved if the following recommendations are implemented; a small shelf solution which is used in ECO, a fixed slot system in the wallpaper area and the implementation of safety precautions in the company. The purpose of this thesis was to map and analyze Färggrossen in order to improve the inventory, warehouse layout and the methods being used in the warehouse management. With our recommendations, the company will have an improved and new warehouse layout, the processes will be improved and the efficiency will be increased.

Made available in DSpace on 2016-06-02T19:06:04Z (GMT). No. of bitstreams: 1 5138.pdf: 2676227 bytes, checksum: 72ab4695bfe8833d7d34d1e803a6ec9a (MD5) Previous issue date: 2012-12-13 / Financiadora de Estudos e Projetos / The growing concern with the support of the decision-making process has made companies to search technologies that support their decisions. The technology most widely used presently is the Data Warehouse (DW), which allows storing data so it is possible to produce useful and reliable information to assist in strategic decisions. Combining the concepts of Spatial Data Warehouse (SDW), that allows geometry storage and managing, and Temporal Data Warehouse (TDW), which allows storing data changes that occur in the real-world, a research topic known as Spatio-Temporal Data Warehouse (STDW) has emerged. STDW are suitable for the treatment of geometries that change over time. These technologies, combined with the steady growth volume of data, show the necessity of index structures to improve the performance of analytical query processing with spatial predicates and also with geometries that may vary over time. In this sense, this work focused on proposing an index for STDW called Spatio-Temporal Bitmap Index, or STB-index. The proposed index was designed to processing drill-down and roll-up queries considering the existence of predefined spatial hierarchies and with spatial attributes that can vary its position and shape over time. The validation of STB-index was performed by conducting experimental tests using a DWET created from synthetic data. Tests evaluated the elapsed time and the number of disk accesses to construct the index, the amount of storage space of the index and the elapsed time and the number of disk accesses for query processing. Results were compared with query processing using database management system resources and STBindex improved the query performance by 98.12% up to 99.22% in response time compared to materialized views. / A crescente preocupação com o suporte ao processo de tomada de decisão estratégica fez com que as empresas buscassem tecnologias que apoiassem as suas decisões. A tecnologia mais utilizada atualmente é a de Data Warehouse (DW), que permite armazenar dados de forma que seja possível produzir informação útil e confiável para auxiliar na tomada de decisão estratégica. Aliando-se os conceitos de Data Warehouse Espacial (DWE), que permite o armazenamento e o gerenciamento de geometrias, e de Data Warehouse Temporal (DWT), que possibilita representar as mudanças nos dados que ocorrem no mundo real, surgiu o tema de pesquisa conhecido por Data Warehouse Espaço-Temporal (DWET), que é próprio para o tratamento de geometrias que se alteram ao longo do tempo. Essas tecnologias, aliadas ao constante crescimento no volume de dados armazenados, evidenciam a necessidade de estruturas de indexação que melhorem o desempenho do processamento de consultas analíticas com predicados espaciais e com variação das geometrias no tempo. Nesse sentido, este trabalho se concentrou na proposta de um índice para DWET denominado Spatio- Temporal Bitmap Index, ou STB-index. O índice proposto foi projetado para o processamento de consultas do tipo drill-down e roll-up considerando a existência de hierarquias espaciais predefinidas, sendo que os atributos espaciais podem variar sua posição e sua forma ao longo do tempo. A validação do STB-index ocorreu por meio da realização de testes experimentais utilizando um DWET criado a partir de dados sintéticos. Os testes avaliaram o tempo e o número de acessos a disco para a construção do índice, a quantidade de espaço para armazenamento do índice e o tempo e número de acessos a disco para o processamento de consultas analíticas. Os resultados obtidos foram comparados com o processamento de consultas utilizando os recursos disponíveis dos sistemas gerenciadores de banco de dados, sendo que o STB-index apresentou um ganho de desempenho entre 98,12% e 99,22% no tempo de resposta das consultas se comparado ao uso de visões materializadas.

Made available in DSpace on 2016-06-02T19:06:18Z (GMT). No. of bitstreams: 1 6327.pdf: 10668384 bytes, checksum: 806ac414d43596c366d93b4bfc0febe0 (MD5) Previous issue date: 2014-10-09 / Universidade Federal de Minas Gerais / A data warehouse is a solution for organizing and storing multidimensional data related to decision-making processes in companies, generating a historical, highly voluminous, subject-oriented and nonvolatile database. A geographic data warehouse (GDW) additio¬nally to the conventional data storage (i.e. numeric and alphanumeric data), stores spatial data as attributes in dimension tables or as measures in fact tables, storing data represented by geometries. Points, lines and polygons are examples of spatial data types. While spatial data currently stored in GDWs are crisp, i.e., they have exact location in the space, strict interiors and well-defined boundaries, geographic applications have required the storage of vague spatial data, which have inaccurate location, inexact interiors or uncertain bounda¬ries. This Master s research aims at incorporating vague spatial data to GDWs. More speci¬fically, we propose and implement a new abstract data type (ADT) called VagueGeometry to represent vague spatial data in the Spatial Database Management System (SDBMS) Post- greSQL/PostGIS. The proposal of the ADT VagueGeometry encompasses the issue of phy¬sical storage for vague spatial data, which are complex and can have several disjoint parts. It also focuses on definitions of operations to handle vague spatial objects, such as vague topological predicates and its operators. Experimental evaluations were conducted in order to assess the performance of the ADT VagueGeometry in comparison to available solutions, such as implementation of vague topological predicates utilizing existing operations of the PostGIS. The proposed ADT VagueGeometry shown reductions in query processing with vague topological predicates from 81.63% to 90.34% in spatial databases and reductions from 92.46% a 95.20% in GDW environments. This Master s project, therefore, advances in the state of art in GDWs to study this gap in the literature. Additionally, fuzzy models to represent vague spatial data was also studied, and as a result, a preliminary proposal of a ADT, called as FuzzyGeometry, was also developed. / Um data warehouse é uma solução para a organização e o armazenamento de dados mul-tidimensionais relacionados a tomada de decisão estratégica em empresas, constituindo um banco de dados histórico, volumoso, orientado ao assunto e não volátil. Um data warehouse geográfico (DWG) adicionalmente ao armazenamento de dados convencionais (tais como dados numéricos e alfanuméricos), armazena dados espaciais como atributos em tabelas de dimensão ou como medidas em tabelas de fatos, ou seja, armazena dados representados por meio de geometrias. Pontos, linhas e polígonos são exemplos de dados espaciais armazena¬dos. Enquanto estes dados armazenados atualmente em DWGs sao crisp, ou seja, possuem localização, interiores e fronteiras bem definidas, aplicações geográficas tem demandado o armazenamento de dados espaciais vagos, os quais possuem localização, interiores ou fronteiras incertas. Esta pesquisa de mestrado visa incorporar dados espaciais vagos em DWGs. Mais especificamente, foi proposto e implementado um novo tipo abstrato de dados (TAD), denominado VagueGeometry, para representar dados espaciais vagos no Sistema Gerenciador de Banco de Dados (SGBD) PostgreSQL com a extensão espacial PostGIS. A proposta do TAD VagueGeometry engloba a proposta de uma forma de armazenamento interna para os dados espaciais vagos, os quais são complexos e podem possuir diversas partes disjuntas. Isso também inclui a definição de operações para manipular objetos espa¬ciais vagos, tais como os relacionamentos topológicos vagos e seus operadores. Avaliações experimentais foram conduzidas para medir o desempenho do TAD VagueGeometry frente a soluções existentes, tal como a implementação de predicados topológicos vagos reuti¬lizando operações existentes do PostGIS. A proposta do TAD VagueGeometry apresentou reduções no tempo de processamento de predicados topológicos vagos de 81,63% a 90,34% em bancos de dados espaciais e reduções de 92,46% a 95,20% em ambientes de DWG. Este trabalho, portanto, avança no estado da arte em DWGs de forma a preencher essa lacuna existente na literatura. Adicionalmente, modelos fuzzy para representação dos dados espa¬ciais vagos também foram estudados e uma proposta preliminar de um TAD, denominado FuzzyGeometry, também foi desenvolvida.

In recent years, Hallsta Paper Mill has experienced significant changes in the demand for paper. The ordershave become smaller and more customer-specific, while the graphical paper industry has steadily declined.As a result of these changes, the employees at Hallsta Paper Mill feel that the finished goods warehouse isno longer optimally designed, and they have identified that waste occurs in the warehouse. Therefore, thepurpose of the study was to provide suggestions on how the activities in the warehouse could become moretime-efficient and investigate how the finished goods warehouse could be designed to suit today’s demandbetter. To facilitate the answering of the purpose, three research questions were formulated: What areas ofimprovement exist in the finished goods warehouse regarding its activities and layout? What effects can beobtained by addressing the identified areas of improvement? and What solutions are recommended for thefinished goods warehouse at Hallsta Paper Mill? The study’s first research question was answered by conducting interviews, a spaghetti diagram, and ananalysis of produced paper rolls. The interviews were conducted with employees who either workoperationally or administratively in the warehouse to get a comprehensive picture of how the work isperformed and where waste occurs within the activities. The spaghetti diagram identified the movementpattern for the trucks in the warehouse and provided indications if unnecessary long transports occurred ornot. The analysis of produced paper rolls examined how well the storage compartments in the finishedgoods warehouse were dimensioned based on today’s demand. Based on the collected data, nine areas ofimprovement were identified, seven areas linked to the activities in the warehouse and two areas linked tothe layout of the warehouse. After the areas of improvement were identified, the study’s second research question was answered bydeveloping solutions within each area of improvement. To develop the solutions linked to the activities inthe warehouse, root cause analyses were performed, where each area was examined to find the root causeof the problem. For the solutions linked to the design, inspiration was instead taken from the warehouselayout and article placement literature. A total of 23 solutions were developed, 19 linked to the activitiesand four linked to the layout. For each solution, it was then analysed what effects an implementation of thesolution would provide, focusing on possible time savings. The effects were analysed with help from theliterature and the authors’ knowledge of logistics. After the effects had been analysed, each solution was assessed based on the effects identified in theprevious research question. The solutions were placed in effort-impact diagrams based on how much effortis required to implement the solution and how much impact is expected from the solution. When assessingthe impact, extra consideration was given to possible time savings, as it was the highest priority accordingto the directives from Hallsta Paper Mill. The assessment then resulted in a recommendation on how thesolutions should be approached. The less effort required and the more impact a solution would bring, thehigher priority was given to the solution. To summarise, two solutions were recommended to beimplemented immediately, nine solutions should be implemented in a second step, seven solutions shouldbe considered and investigated further, and two solutions should be rejected. The solutions aimed to makethe warehouse activities more time-efficient and suggest how the warehouse could be designed to suittoday’s demand better.

Bakgrund: Lagerverksamheten har en väsentlig betydelse och kan vara avgörande för organisationen övergripande prestanda och framgång, i synnerhet för SMF (små och medelstora företag). Driften av lagerverksamheten kan bli särskilt utmanande om organisationen befinner sig i en stark tillväxtfas och om den aktuella artikeln kännetecknas av behov. För att effektivt kunna bedriva sin lagerverksamhet bör organisationer utgå från en lagerdesign. Däremot redogör inte dagens forskning hur SMF som befinner sig i en stark tillväxtfas samt lagerhåller en artikel med behov bör utforma en sådan lagerdesign. Syfte: Denna studie syftar till att föreslå en lagerdesign som tar hänsyn till artikelns behov. Vidare ämnar studien att undersöka vilka konsekvenser en hög tillväxtfas har på ett SMF:s lagerverksamhet. Metod: Studien har studerat organisationen Nordic Green Design AB, ett svenskt SMF vars artikelsortiment utgörs av prydnadsväxter. Artikelns behov förutsätter krav på rätt temperatur, ljus och bevattning. Datainsamlingen har utgått från intervjuer med organisationens lagerpersonal och marknadschef samt via observationer av organisationens befintliga lagerdesign. Data har därefter analyserats utifrån den teoretiska referensramen. Slutsats: Studien betonar vikten av att fastställa behov och krav i samband med utformandet av en lagerdesign, i synnerhet när artikeln präglas av behov. Fastställandet av behov och krav fastställer ramarna för vilka lagerhanteringsmetoder som är tillämpbara i lagerdesignen. Genom att skifta fokus mot fastställandet av behov och krav kan en effektivare lagerverksamhet uppnås. Vidare indikerar studien på att en stark tillväxtfas bidrar till omfattande organisatoriska utmaningar. Studiens resultat antyder att en decentraliserad organisationsstruktur har bäst förutsättningar för att hantera dessa utmaningar. / Background: Warehousing activities are essential and can be crucial to the organizations overall performance and success, especially for SMEs (small and mediumsized enterprises). The warehouse operations can be particularly challenging if the organization is in a rapid growth phase and if the stored article is characterized by requirements. In order to effectively carry out the warehouse operations, organizations need to develop a warehouse design. However, today’s research does not acknowledge how SME’s with above-mentioned prerequisites should form such warehouse design. Purpose: This study aims at proposing a warehouse design that takes into account the requirements of the article. Furthermore, the study intends to examine the consequences of a rapid growth phase on an SME's warehouse. Method: This paper has studied the organization Nordic Green Design AB, a Swedish SME, whose articles consists of ornamental plants. These products require specific care such as temperature, light and irrigation regulation. The data collection was based on interviews with the organization's warehouse staff and marketing manager. Additionally, data was collected through observations of the organization's existing warehouse design. The data has then been analyzed based on the theoretical reference frame. Conclusion: The study emphasizes the importance of identifying needs and requirements when developing a warehouse design, especially when the article is characterized by requirements. The determination of needs and requirements determines the foundation of which storage management methods that are applicable in the warehouse design. By shifting focus to the determination of needs and requirements, more efficient storage can be achieved. Furthermore, the study indicates that a rapid growth phase contributes to extensive organizational challenges. The results of the study suggest that a decentralized organizational structure has the best prerequisites for managing these challenges.

Background: In recent years the customers ordering pattern has changed, which has increased the demand for companies efficiency in inventory management. In order to create a profitable logistics company, it is important to design an efficient warehouse design to strengthen competitiveness. When designing a warehouse, it is important to take into account the characteristics of the articles and their demand. Streamlining the company's inventory design can result in reduced costs and improved customer service. Purpose: The purpose of the essay is to identify waste and its underlying causes and to suggest improvement proposals for the warehouse design, in order to improve the efficiency of inventory management for the IT-company”X”. Method: The essay´s starting point is a qualitative research method, where a case study was carried out. The information has emerged through semi-structured interviews and structured observations with the company's employees. To strengthen the data collection, relevant theory and qualitative data from the company's internal material were used. The study used the analysis method to build an explanation, as an understanding of the first research question was needed in order to answer the second research question. Results: After the completed study it was determined through interviews and observations which problems that occur at the IT-company ”X”. Based on the information, connections to theory have been made where waste and its underlying causes have been reported. A few examples of waste that emerged during the answering of the first research question were extra processing, unnecessary transportation, excess movement of employees. The underlying causes were for instance concentrated order picking, item placement according to frequency and picking at different height levels. In order to answer research question 2, improvement proposals have been presented for zone distribution, article placement and picking height level, with the aim of making inventory management more efficient. / Bakgrund: De senaste åren har kundernas beställningsmönster förändras, vilket ökar kravet på företags effektivitet vid lagerhanteringen. För att skapa ett lönsamt logistikföretag är det av vikt att utforma en effektiv lagerutformning för att stärka konkurrenskraften. Vid utformning av ett lager är det av betydelse att ta hänsyn till artiklarnas egenskaper samt dess efterfrågan. Effektivisering av företagets lagerutformning kan resultera i minskade kostnader och en förbättrad kundservice. Syfte: Syftet med uppsatsen är att identifiera slöserier och dess bakomliggande orsaker samt föreslå förbättringsförslag till lagerutformningen, för att it-företaget “X” ska kunna effektivisera lagerhanteringen. Metod: Uppsatsens utgångspunkt ligger i en kvalitativ forskningsmetod, där en fallstudie genomförts. Underlaget har framkommit via seminstrukturerade intervjuer samt strukturerade observationer med företagets medarbetare. För att stärka datainsamlingen användes relevant teori samt kvalitativ data från företagets interna material. Studien använde analysmetoden att bygga upp en förklaring, då en förståelse av den första forskningsfrågan behövdes för att besvarandet av den andra forskningsfrågan kunde genomföras. Slutsats: Efter genomförd studie har det fastställts genom intervjuer och observationer vilka problem som uppkommer hos it-företaget “X”. Utifrån informationen har kopplingar till teori utförts där slöserier och dess bakomliggande orsaker redovisats. Några exempel på slöserier som framkom under besvarandet av den första forskningsfrågan var extra bearbetning, onödiga transporter, överflödig rörelse av anställda. Bakomliggande orsaker till dessa var bland annat koncentrerat orderplock, artikelplacering utefter frekvens och plock på olika höjdnivåer. För att besvara forskningsfråga 2 har förbättringsförslag presenterats till zonindelning, artikelplacering samt höjdnivå av plock, i syfte att effektivisera lagerhanteringen.

Master of Science / Department of Grain Science and Industry / Bhadriraju Subramanyam / Heat treatment of grain-processing facilities involves using elevated temperatures of 50- 60˚C for 24 h or less to manage stored-product insects. Heat is an alternative to a non-ozone depleting fumigant sulfuryl fluoride, which was registered in the United States in 2004 for disinfestation of grain-processing facilities. In this study, life history traits of the warehouse beetle, Trogoderma variabile Ballion, were characterized on ground cat food at 28°C and 65% RH to facilitate harvesting life stages of a specific age for bioassays with heat. Eggs laid by females were observed for daily eclosion. Eggs hatched on days 6 through 10, and the mean proportion for egg hatching was 87%. Larvae hatching from eggs (first instars) were reared on ground cat food and their head capsule widths were measured every 2 d until all larvae became pupae. Head capsule widths indicated six instars and the total larval duration ranged from 28-40 d. Pupae became adults in 3-9 d. Newly eclosed unmated female adults lived 7 d longer than unmated males (16 d), whereas mated males lived 2 d longer than mated females (8 d). Eggs were not observed when food was not provided to male and female pairs. Females started laying eggs 2 d after pairing until the fifth day. The total number of eggs laid by mating pairs in the presence of food ranged from 30 to 135. Exposure of eggs, young larvae, old larvae, pupae, and adults of T. variabile at 46, 50, and 54°C and 15-20% RH for four fixed time periods showed pupae to be generally more heat tolerant than other life stages. At 46, 50, and 54°C, complete mortality of all stages occurred at 1440, 120, and 30 min, respectively. Pupae also were generally more heat tolerant than other life stages during tests in pilot flour and feed mills at Kansas State University and in a commercial grain-processing facility. However, results from pilot and commercial mills were not as conclusive as the results at fixed temperatures in the laboratory.

ITC/USA 2006 Conference Proceedings / The Forty-Second Annual International Telemetering Conference and Technical Exhibition / October 23-26, 2006 / Town and Country Resort & Convention Center, San Diego, California / This paper is a follow on to a paper presented at the 2005 International Telemetry Conference by Dr. Samuel Harley et. al., titled Data, Information, and Knowledge Management. This paper will describe new techniques and provide further detail into the inner workings of the VISION (Versatile Information System – Integrated, Online) Engineering Performance Data Mart.