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No description available.

In the pharmaceutical industry it has become common to use single-use components in the production line to save time and money. Therefore, a team at General Electric started to develop a single-use Coriolis flowmeter, PolyCor M13, targeted at liquid chromatography systems. A Coriolis flowmeter in this embodiment is simply a tube put into vibration at its natural frequency. When there is a flow through the vibrating tube the Coriolis force arises, causing a phase shift of the pickup signals on each side of the actuator. This phase shift is linearly proportional to the mass flow through the tube.  The approach of PolyCor M13 is a separate oscillator and flow path. The oscillator is a metal skeleton holding the flow path, a silicone tube. The initial requirement flow range was 0.16-7.8 kg/min with an error less than 2%. Initial tests indicated that the prototype fulfilled these requirements at ambient temperature. This thesis is a further evaluation of the performance of M13. The main goal was to establish the pressure and temperature dependence and find an model to compensate for these. Investigation if M13 can manage flows up to 10 kg/min was also a part of this scope.  Control measurements showed that flows less than 2 kg/min could give large errors, over 5%. Flows higher than 2 kg/min up to 10 kg/min had errors less than 5%. The error was determined using a reference mass flow. By increasing the pressure in the system, from 0 to 4 bar, the error increased substantially. For the two lowest flows tested, 0.5 and 1 kg/min, the computed mass flows gave errors over 100%. The error for 2 kg/min was around 70% and the error successively decreased for higher flows and at 6-10 kg/min the error was around 20%. A compensation model was established by fitting a polynomial to the data. The best compensation model managed to reduce the error on new test data to 5-10% for flows between 2-10 kg/min. For smaller flows the error was still high but less than 100%.  Significant deviation from the temperature at which the proportionality was determined caused large errors. Errors for low flows, 0.5 and 1 kg/min, gave errors mainly up to around 50% but some errors were over 100%. For higher flows, 2-10 kg/min the error is up to 30% with some occasional errors up to 60%. The procedure to establish a compensation model for temperature was similar to that for the pressure compensation model. The best model for temperature compensation managed to reduce the error to 5-10% for flows between 2-10 kg/min. For lower flows the error was still high but slightly better, some error was still over 100%.  In conclusion, M13 is not as reliable as initial tests showed. The error limit is exceeded, especially for flows less than 2 kg/min. A more suitable range would be 2-10 kg/min. The pressure and temperature effects have an enormous impact but can be compensated to some extent. Since the accuracy of M13 is not perfect, errors less than 5% can be difficult to obtain in the current state of M13.

The goal of this study was to investigate future controls of heating loads in a comfort laboratory. The laboratory room is used to simulate how the room comfort will change by using one or more cooling beams. External walls can be used to test different room sizes, and heat effects can be provided from the floor and one wall. The study was conducted according to a two-level factor design and the five factors used were floor heating, north wall, west wall, fan and facade wall. In a full two-level factor test plan, there are 32 tests for five factors that needed to be done. Instead of making 32 tests, the study continued with a fractional two-level factor design, which meant that only 16 tests were performed. The response variable for the tests was the so called "losses" which may be positive or negative and is a percentage of the floor effect. Via "losses" the average temperature of the measuring room could be 24.5 ˚C, which was the temperature chosen for this survey. Before the results for each test were taken, requirements for "steady state condition" were met. The requirements are taken from an ISO standard that the company uses, and it provides reliability of the results. The analyzes when having "losses" as a response variable also pointed out the floor as the most influential factor. However, there were different results regarding the scheme on the other factors. It is due to different coding of the factors, and "losses" was used in the units % or watts. Some disturbances were detected in the results. One is that "losses" has a connection to the floor heating, which may be the reason it is most significant. The two levels of the floor heating did not match because "losses" changed the levels. For the next two-level factor design experiment, it is recommended that the effect of the floor is constant because of its connection to "losses". The response variable can therefore be "losses". The constant on the floor heating can be changed when the factor plan is repeated several times to see how "losses" varies with different floor effects.

Idag står organisationer inför ständiga utmaningar att förändra och effektivisera sin verksamhet, vilket kan förklaras med det ökade kravet på ökad lönsamhet och kostnadsnedskärningar. Detta har bidragit till att företagsledningar oftast löser dessa ökade krav genom kostnadsrationaliseringar. Dock har det visat sig vara mindre framgångsrikt. Ambitionen med examensarbetet har varit att undersöka hur ledarskap kan utövas för att uppnå TQM, effektivitet och lönsamhet. Ett svenskt byggföretag har varit föremål för denna fallstudie. Fallstudien har genomförts genom strukturerade djupintervjuer med tre gruppchefer samt enkätfrågor till medarbetare. Det huvudsakliga resultatet från den här uppsatsen är begreppet lönsamt ledarskap, vilket är genererat ur det analyserade materialet. Studiens resultat visar att det är flera faktorer som bidrar till det lönsamma ledarskapet. Resultatet visar att hörnstenarna i hörnstensmodellen är en stor bidragande faktor till det lönsamma ledarskapet. Emellertid har studiens resultat kommit fram till att den sjätte hörnstenen “engagerat ledarskap” är mycket viktig för organisationens framgångssaga vad gäller lönsamhet, kortsiktigt som långsiktigt. / <p>2018-08-29</p>

Este trabalho apresenta um método de elaboração e aplicação de um plano de manutenção baseado nos preceitos da MCC aplicado em uma indústria de bebidas. O método contempla: i) Escolher o processo a ser estudado e realizar levantamento de dados; ii) identificar os conjuntos e subconjuntos que impactam na confiabilidade; iii) levantar a taxa de falhas desses subconjuntos; iv) desenvolver uma FMEA para levantamento dos maiores riscos associados ao equipamento em estudo e v) estabelecer planos de ação da manutenção mais adequado, visando à redução dos riscos levantados na FMEA. A aplicação da proposta é ilustrada através de um estudo real realizado em um processo de envase de uma linha de produção de refrigerantes. A aplicação do método permitiu identificar com precisão os conjuntos e subconjuntos que tinham maior impacto na confiabilidade do equipamento em questão. Entre os principais resultados obtidos, destacam-se: i) ampliação do faturamento em cerca de um milhão por ano, ii) ampliação da satisfação e moral das pessoas, iii) redução do uso de horas extras, iv) redução de 10% no descarte de produtos não conformes, v) possibilidade de adiar em cerca de um ano investimentos de ampliação da linha, e vi) redução dos níveis de estoque, uma vez que existe maior grau de certeza de que o item vai manter sua função pelo período estabelecido. / This paper presents a method for preparation and application of a maintenance plan based on precepts of the MCC applied in a beverage industry. The method comprises: i) Choose the process to be improved and perform data collection; ii) identify assemblies and sub-assemblies that impact on reliability; iii) compute the failure rate of these sub-assemblies; iv) develop a FMEA for computation of major risks associated with the equipment under study and v) establishment of an action plan comprising the most appropriate maintenance activities, aimed at reducing the risks estimated by the FMEA. The implementation of the proposal is illustrated by a study performed in a real process of packaging in a production line of soft drinks. The application of the method allowed identifying more accurately the assemblies and sub-assemblies that had the greatest impact on the reliability and availability of the equipment in question. Among the main results obtained we emphasize: (i) the expansion of sales in about a million a year, (ii) greater satisfaction and morale of the employees, (iii) reduction of overtime, (iv) reduction of 10% in non-compliant products, (v) possibility of postpone expansion investments in about a year, and (vi) reduction of inventory levels, since there is greater certainty that the item will keep your function for the established period.

Este trabalho apresenta um método de elaboração e aplicação de um plano de manutenção baseado nos preceitos da MCC aplicado em uma indústria de bebidas. O método contempla: i) Escolher o processo a ser estudado e realizar levantamento de dados; ii) identificar os conjuntos e subconjuntos que impactam na confiabilidade; iii) levantar a taxa de falhas desses subconjuntos; iv) desenvolver uma FMEA para levantamento dos maiores riscos associados ao equipamento em estudo e v) estabelecer planos de ação da manutenção mais adequado, visando à redução dos riscos levantados na FMEA. A aplicação da proposta é ilustrada através de um estudo real realizado em um processo de envase de uma linha de produção de refrigerantes. A aplicação do método permitiu identificar com precisão os conjuntos e subconjuntos que tinham maior impacto na confiabilidade do equipamento em questão. Entre os principais resultados obtidos, destacam-se: i) ampliação do faturamento em cerca de um milhão por ano, ii) ampliação da satisfação e moral das pessoas, iii) redução do uso de horas extras, iv) redução de 10% no descarte de produtos não conformes, v) possibilidade de adiar em cerca de um ano investimentos de ampliação da linha, e vi) redução dos níveis de estoque, uma vez que existe maior grau de certeza de que o item vai manter sua função pelo período estabelecido. / This paper presents a method for preparation and application of a maintenance plan based on precepts of the MCC applied in a beverage industry. The method comprises: i) Choose the process to be improved and perform data collection; ii) identify assemblies and sub-assemblies that impact on reliability; iii) compute the failure rate of these sub-assemblies; iv) develop a FMEA for computation of major risks associated with the equipment under study and v) establishment of an action plan comprising the most appropriate maintenance activities, aimed at reducing the risks estimated by the FMEA. The implementation of the proposal is illustrated by a study performed in a real process of packaging in a production line of soft drinks. The application of the method allowed identifying more accurately the assemblies and sub-assemblies that had the greatest impact on the reliability and availability of the equipment in question. Among the main results obtained we emphasize: (i) the expansion of sales in about a million a year, (ii) greater satisfaction and morale of the employees, (iii) reduction of overtime, (iv) reduction of 10% in non-compliant products, (v) possibility of postpone expansion investments in about a year, and (vi) reduction of inventory levels, since there is greater certainty that the item will keep your function for the established period.

Este trabalho apresenta um método de elaboração e aplicação de um plano de manutenção baseado nos preceitos da MCC aplicado em uma indústria de bebidas. O método contempla: i) Escolher o processo a ser estudado e realizar levantamento de dados; ii) identificar os conjuntos e subconjuntos que impactam na confiabilidade; iii) levantar a taxa de falhas desses subconjuntos; iv) desenvolver uma FMEA para levantamento dos maiores riscos associados ao equipamento em estudo e v) estabelecer planos de ação da manutenção mais adequado, visando à redução dos riscos levantados na FMEA. A aplicação da proposta é ilustrada através de um estudo real realizado em um processo de envase de uma linha de produção de refrigerantes. A aplicação do método permitiu identificar com precisão os conjuntos e subconjuntos que tinham maior impacto na confiabilidade do equipamento em questão. Entre os principais resultados obtidos, destacam-se: i) ampliação do faturamento em cerca de um milhão por ano, ii) ampliação da satisfação e moral das pessoas, iii) redução do uso de horas extras, iv) redução de 10% no descarte de produtos não conformes, v) possibilidade de adiar em cerca de um ano investimentos de ampliação da linha, e vi) redução dos níveis de estoque, uma vez que existe maior grau de certeza de que o item vai manter sua função pelo período estabelecido. / This paper presents a method for preparation and application of a maintenance plan based on precepts of the MCC applied in a beverage industry. The method comprises: i) Choose the process to be improved and perform data collection; ii) identify assemblies and sub-assemblies that impact on reliability; iii) compute the failure rate of these sub-assemblies; iv) develop a FMEA for computation of major risks associated with the equipment under study and v) establishment of an action plan comprising the most appropriate maintenance activities, aimed at reducing the risks estimated by the FMEA. The implementation of the proposal is illustrated by a study performed in a real process of packaging in a production line of soft drinks. The application of the method allowed identifying more accurately the assemblies and sub-assemblies that had the greatest impact on the reliability and availability of the equipment in question. Among the main results obtained we emphasize: (i) the expansion of sales in about a million a year, (ii) greater satisfaction and morale of the employees, (iii) reduction of overtime, (iv) reduction of 10% in non-compliant products, (v) possibility of postpone expansion investments in about a year, and (vi) reduction of inventory levels, since there is greater certainty that the item will keep your function for the established period.

Estudos têm sido conduzidos para a implantação da Manutenção Centrada em Confiabilidade em sistemas complexos, seja com o intuito de aumentar a segurança das pessoas envolvidas e do meio ambiente ao redor das instalações, seja com o intuito de diminuir os custos de manutenção envolvidos. Tem destaque nestes estudos o inicial com a implantação em aeronaves da aviação civil e militar, a indústria espacial e também as instalações nas plantas de geração de energia elétrica, especialmente as movidas à energia nuclear. Este trabalho foi conduzido para implantar o sistema de Manutenção Centrada em Confiabilidade na área veicular, especialmente em frotas sob controle e de determinados veículos que trafegam em locais inóspitos e de difícil acesso para resgate em caso de falha. Um levantamento estatístico foi executado e a vida útil da bomba de água no estudo de caso foi determinada, sendo recomendada uma inspeção nas mesmas. A conclusão a que se chegou é de que é sim possível, em determinados componentes, implantar a Manutenção Centrada em Confiabilidade, realizando-se a análise de vida e a especificação de um tempo correto para a inspeção e troca do componente antes de sua falha, que pode ser crítica, trazendo prejuízos a outras partes dos veículos. / Studies have been conducted for the implementation of Reliability Centered Maintenance in complex systems, is aiming to increase the safety of those involved and environment around the facility, either in order to reduce maintenance costs involved. These studies have highlighted the initial deployment in airplanes of civilian and military aviation, space industry and also in the plants to generate electricity, especially those powered by nuclear energy. This study was conducted to establish the Reliability Centered Maintenance system in the vehicle area, especially in fleets under control and certain vehicles that travel in places inhospitable and inaccessible for rescue in case of a failure. A statistical survey was performed and the useful life of water pump in the case study has been determined and recommended an inspection in them. The conclusion is that it is indeed possible in certain components, deploy the Reliability Centered Maintenance, performing the age exploration and the specification of a correct time for inspection and replacement of the component before its failure, which can be critical, causing damages to other vehicle parts.

Syftet med det här arbetet var att bidra till utvecklingen av kvalitetsutvecklingsområdet genom att beskriva hur en Agile verksamhet använder arbetsmötet som ett strategiskt verktyg i sitt kvalitetsutvecklingsarbete. Detta genom att studera dels hur teamet använder Agile för att driva kvalitetsutvecklingsarbetet och hur arbetsmötena är strukturerade, dels teammedlemmarnas upplevelse av arbetsmötenas kvalitet och mötesledarens funktion. Arbetet genomfördes som en fallstudie där studieobjektet var ett systemutvecklingsteam på ett internationellt företag. De undersökningsmetoder som användes var intervjustudie, observationsstudie och enkätstudie. Arbetet genomfördes inom ramen för Mittuniversitetets magisterprogram i kvalitets och ledarskapsutveckling. Resultatet visade att det studerade teamet har hittat formerna för att använda arbetsmötet som motor för kvalitetsutvecklingsarbetet. Detta genom att anamma de principer som förbättringsprogrammet Agile bygger på. Principer som utgår från ett stort fokus på att hitta former för en fungerande interaktion mellan individer liksom på arbetssätt som gör det möjligt att snabbt ställa om till nya förutsättningar. Teamet arbetade enligt en väl genomarbetad och förankrad mötesstruktur som gjorde att deltagarna kunde fokusera på vad de skulle bidra med under mötet. Ledaren av arbetsmötet visade sig fylla två viktiga funktioner: dels den uppgiftsrelaterade som handlade om att leda arbetsmötet mot de uppgifter som skulle hanteras, dels den gruppunderhållande som innebar att underlätta interaktionen i teamet. Trots att teammedlemmar ägnade stor del av sin arbetstid i arbetsmöten upplevde de en hög grad av nöjdhet med kvaliteten i arbetsmötena. / The purpose of this work was to contribute to the development of Total Quality Management, TQM, by describing how an Agile organization uses the workplace meeting as a strategic tool in its quality development work. The work focused on how the team use Agile to drive its quality development work, the structure around work meetings, the function of the leadership during the work meetings and the team member’s experiences when it comes to the quality of the work meetings. The work was conducted as a case study where the subject was a system development team at an international company. The survey methods used were interview study, observation study and questionnaire study. The work was carried out within the framework of Mid Sweden University's Master's Program in Quality and Leadership Development. The result showed that the studied team has found ways to use the workplace meeting as a motor for TQM. This by adopting the principles based on the Agile improvement program. Principles that focus on finding forms for a functional interaction with individuals as well as working methods that enable quick adoption to new conditions. The team worked according to a well- and firmly established meeting structure that allowed participants to focus on what to contribute with during the meeting. The leader of the meeting proved to fill two important functions: the task-related which was to lead the working meeting to the tasks that were to be handled, and the group-maintenance which was to facilitate the team interaction. Even though the team members spent much of their working hours in work meetings, they experienced a high level of satisfaction with the quality of the work meetings. / <p>2017-06-28</p>