The thesis deals with a comparative analysis of strain of parts using finite element method (FEM) and measurement of the optical system Pontos. Part was used the reflector of Volkswagen Polo. The subject of comparing were the values of deviations optical shield of reflector which excitation random vibration described power spectral density. The thesis presented describes of experimental measurements to obtain the boundary conditions using optical systems. FEM analysis was performed using software ANSYS Workbench 12.

Prenumerationsmodellen är inget nytt fenomen, men har på senare tid spridit sig till nya branscher. Modellen har populariserats till följd av bland annat digitaliseringen, den ökade konkurrensen och nya framväxande kundvärden. Prenumerationsmodellen har fått positiv kritik för sina återkommande och förutsägbara intäkter, men för att det ska bli verklighet krävs det att kunderna stannar kvar. Flertalet prenumerationsföretag har låga utträdesbarriärer, vilket resulterar i att de kontinuerligt behöver skapa ett högt uppfattat värde för att kunderna ska stanna kvar. För att prestera väl och uppnå mål såsom att skapa ett högt uppfattat värde kan företag använda sig av prestationsmätning.Studiens syfte är att bidra med ny kunskap som förklarar hur företag med en prenumerationsmodell använder prestationsmätning i syfte att förlänga kundernas varaktighet.Studien har genomförts genom kvalitativa intervjustudier på fyra prenumerationsföretag inom olika branscher. Genom att studera likheter hos studieobjekten har slutsatser kunnat dras som kan förklara prenumerationsföretag generellt.Studien kom fram till att prenumerationsföretag, i syfte att förlänga kundernas varaktighet, använder prestationsmätning för de attribut som identifierats som särskilt värdeskapande för värdeerbjudandet. På så sätt kan prestationsmätningen användas mer optimalt för att skapa kundvärde och därmed förlänga kundernas varaktighet. Därtill fann studien att mål och mått i stor utsträckning är specifika för enskilda prenumerationsföretag. Studien fann även att värdeerbjudandet tycks påverka hur prenumerationsföretag använder sin prestationsmätning. Genom att prenumerationsföretag använder information från prestationsmätningen i syfte att agera på avvikelser, ökar deras möjlighet att förlänga kundernas varaktighet. Däremot tycks marknadsandel vara ett olämpligt mått för att besvara huruvida prenumerationsföretag skapar kundvärde och bör således inte användas i syfte att förlänga kundernas varaktighet. Slutligen fann studien att prenumerationsföretag använder en kombination av diagnostisk och interaktiv uppföljning och att det ständigt föränderliga kundvärdet innebär att uppföljningen till stor del är interaktiv.

Supply chain risk management (SCRM) is a topic that gains more and more interest from both the academic and practitioner’s perspective. The reason for this is the increased complexity in the global supply chain (SC) networks and many managers do not realize the risks they build in their SC by the continuous search to cut cost and decrease tied up capital. One problem with SCRM is that it is hard to measure the performance of it and if it is really beneficial to work with it. The objective for this master thesis is to investigate how companies can evaluate and thereby improve their SCRM efforts by connecting the field of SCRM to the field of performance measurement systems (PMS). First, a thorough literature search was conducted where the current literature about SCRM and PMS was examined to understand what the literature recommends. This was followed by a multiple case study including semi-structured interviews with SC managers at eight companies to get the practical aspect of the problem.The results of the research show that companies work with SCRM in many different ways. The companies that have advanced furthest are the ones that have connected their SCRM to existing key performance indicators (KPIs) and because of that they have been able to measure the results of their SCRM efforts. The top-performers had a comprehensive understanding of their risk drivers and risks that affected their SC, which was consistent with the literature. Connecting the SCRM to the PMS, the companies can better monitor how the SCRM affect the performance goals for the SC performance. Then the next step is then to connect key risk indicators (KRIs) to the key KPIs that will give managers longer time to react to potential risks. Only one company in the study had accomplished this, hence, there is a great space for improvements for many companies.

To measure the performance of research and development organizations has long been a difficult task and still is partly due to the complex nature of its processes and activities, but also since the outcome in many cases can be seen first after many years. Also, the outcome is dependent on efforts from several other business functions within an organization. There has been a shift in how organizations view R&D, from being technology-push centered, where R&D had full responsibility of all innovations, to collaborating with innovation across functions within a company. Historically, R&D has been considered to be impossible to manage and control, but as the development has taken place R&D is now aligned with an organization’s business strategy. There is a vast amount of literature on performance measurement systems with focus on R&D to access, however, the focus of that research has been on evaluating performance of an entire R&D department or a specific project and not as much can be found on how to evaluate R&D related activities, which is what this thesis centers on. The research in this thesis has been done by conducting a case study at Sandvik Materials Technology’s R&D department in Sandviken, Sweden. Three case study objects have been studied within the case study and these objects are the OCTG project, non-destructive testing and hydraulic & instrumentation tubing. The case study consisted of interviews with employees at various functions within the company, an extensive literature review as well as a review of internal documentation. The result from the case study has been the design of a performance measurement  ramework and its application to the three case study objects, illustrating that it is possible to measure the performance of R&D related activities, thus, enabling a more transparent view of what value R&D contributes with. The framework is created in a way that allows for other organizations with similar settings as the one currently in place at Sandvik Materials Technology to utilize it. Implications from the findings have an impact both from an industrial and research perspective, but also from a sustainability perspective. The industrial implication is that a framework for evaluating and illustrating the performance of a R&D organization on an activity level has been designed. Considering the research aspects, this research contributes to the identified gap in the existing body of knowledge, providing additional knowledge on performance measurement systems on an activity level. From a sustainability perspective the framework enables monitoring and supervising of important processes, which could stimulate employees to undertake necessary actions, potentially leading to reduced negative impact on the environment since a lesser amount of resources and energy is consumed. / Att mäta prestationen av forskning- och utvecklingsorganisationer har länge varit en svår uppgift, vilket det fortfarande delvis är på grund av de komplexa processer och aktiviteter som existerar. Detta beror även på att resultatet av forskning och utveckling (FoU) ej synliggörs förrän långt senare. Vidare är resultatet av FoU beroende av insatser från andra funktioner inom en organisation. Det har skett ett skifte i hur organisationer ser på forskning och utveckling, från att tidigare varit drivna av att utveckla teknologier med fullständigt ansvar för innovationer till att nu arbeta med innovation över funktionsgränserna som existerar i en organisation. Historiskt sett har FoU setts som omöjligt att styra och kontrollera men i takt med att skiftet har skett så är forskning och utveckling nu i linje med en organisations affärsstrategi. Litteratur på ämnet prestationsmätningssystem med fokus på FoU finns att tillgå, men fokus i de studierna har varit att utvärdera prestationen av hela FoU-organisationer eller specifika projekt. Desto mindre finns på ämnet hur man utvärderar FoU-relaterade aktiviteter, vilket är fokus i denna studie. Studien i detta arbete har utförts som en fallstudie på Sandvik Materials Technology’s forsknings- och utvecklingsenhet i Sandviken, Sverige. Tre fallstudieobjekt har studerats inom fallstudien och dessa objekt är OCTG-projektet, oförstörande provning och hydraulik- och instrumentrör. Fallstudien har bestått av intervjuer med anställda på diverse funktioner inom företaget och en extensiv genomgång av litteratur har gjorts samt en genomgång av intern dokumentation. Resultatet från fallstudien blev skapandet av ett ramverk för prestationsmätning och en tillämpning på de tre fallstudieobjekten, vilket syftar till att illustrera möjligheten att mäta prestationen av FoU-relaterade aktiviteter. Detta leder till en mer transparent syn på vilket värde forskning och utveckling bidrar med. Ramverket har skapats på ett sätt som möjliggör organisationer med liknande struktur som existerar på Sandvik Materials Technology att utnyttja det. Implikationerna från resultaten har en inverkan både ur ett industriellt perspektiv och ur ett forskningsperspektiv men även ur ett hållbarhetsperspektiv. Den industriella implikationen är att ett ramverk för utvärdering och synliggörande av prestationer av en forsknings- och utvecklingsorganisation på en aktivitetsnivå har skapats. Vid betraktande av forskningsperspektivet så bidrar denna studie till att fylla det identifierade gapet i kunskapsbanken genom att tillföra ytterligare kunskap av prestationsmätning på en aktivitetsnivå. Ramverket möjliggör övervakning och kontroll av viktiga processer, vilket kan motivera anställda att vidta nödvändiga åtgärder, som kan leda till reducerad negativ inverkan på miljön då en mindre mängd resurser och energi används.

Bakgrund: Traditionellt sett förknippas ekonomistyrning med den formella styrningen och mycket fokus har därmed lagts på den formella styrningen. Eftersom företag idag påverkas av kultur på olika sätt, kan den formella styrningen kompletteras med den informella styrningen. I styrningsarbetet blir ledarnas uppgift att reflektera på inflytande, vägleda och vidta olika åtgärder så att medarbetarna utför önskvärda ageranden. Samtidigt bör hänsyn tas till att det som kommuniceras av ledarna inte alltid uppfattas likadant av medarbetarna. Syfte: Uppsatsen syftar till att beskriva hur företagskultur relaterar med den cybernetiska och administrativa styrningen, med avseende på vilken typ av relation som är förekommande enligt ledarna och medarbetarna. Uppsatsens delsyfte är att beskriva ledarna och medarbetarnas uppfattning om den cybernetiska, administrativa och kulturella styrningen som styrmedel. Metod: Studien har genomförts på en av IKEAs organisationer i Älmhult och är därmed en fallsstudie. Undersökningen utgår ifrån en kvalitativ ansats med femton semistrukturerade intervjuer med ledare och medarbetare. Vidare har studien utgått ifrån en deduktiv ansats. Slutsats: Resultatet av studien visar att företagskultur relaterar till den cybernetiska och administrativa styrningen på flera olika sätt. Kulturen har en kompletterande, stödjande och samverkande effekt på den cybernetiska ochadministrativa styrningen. I vissa fall förekommer det även motsägande relationer mellan styrsystemen. Ytterligare en slutsats som kan dras är att kultur som styrmedel används i större omfång än den cybernetiska och administrativa styrningen i fallföretaget. Ledarna och medarbetarna har liknande uppfattning om den kulturella och administrativa styrningen. Uppfattningen om den cybernetiska styrningen som styrmedel varierar dock bland ledare och medarbetare. / Background: Traditionally, management accounting is associated with formal management and a lot of focus has thus been placed on formal management. Since companies today are influenced by culture in different ways, formal control can be supplemented with informal control. In the management work, the leaders' task is to reflect on influence, guide and take various measures so that the employees perform desirable actions. At the same time, it should be taken into account that what is communicated by the leaders is not always perceived in the same way by the employees. Purpose: The essay aims to describe how organizational culture relates to the cybernetic and administrative management, with respect to what type of relationship is present according to the leaders and employees. The partial aim of the essay is to describe the leaders' and employees' perception of the cybernetic, administrative and cultural management as a means of governance. Method: The study has been carried out at one of IKEA's organizations in Älmhult and is thus a case study. The survey is based on a qualitative approach with fifteen semi-structured interviews with leaders and employees. Furthermore, the study was based on a deductive approach. Conclusion: The result of the study show that corporate culture relates to cybernetic and administrative control in several different ways. Culture has a complementary, supportive and synergistic effect on cybernetic and administrative control. In some cases, there are also contradictory relationships between the control systems. Another conclusion that can be drawn is that culture as a means of control is used to a greater extent than cybernetic and administrative control in the company. Leaders and employees have a similar opinion about the cultural and administrative management. However, the perception of cybernetic governance as a means of governance varies among leaders and employees.

Magistrantūros baigiamojo darbo tikslas yra išanalizuoti 3D lazerines matavimo sistemas, jų panaudojimą geodeziniams darbams ir palyginti su elektroniniu tacheometru. Atliekant tyrimą buvo panaudoti teoriniai bei praktiniai duomenys ir sisteminė analizė. Tyrimo objektas- stacionarus lazerinis skeneris Riegl LMS-Z420i. Pasirinktas prietaisas yra kol kas vienintelis toks Lietuvoje. Modernios technologijos su naujausiais techniniais sprendimais dėl savo produktyvumo gauna vis didesnę reikšmę geodezijoje. Todėl būtina žinoti jų veikimo principus ir panaudojimo galimybes. 3D lazerinės matavimų sistemos palyginti su elektroniniais tachometrais yra naujas dalykas. 3D lazerinės matavimų sistemos - tai įrenginiai, 3D skeneriai, kurie analizuoja realaus pasaulio objektą ir jo aplinką, siekiant surinkti duomenis apie jo formą ir jo išvaizdą (t.y. spalvą). Surinkti duomenys gali būti naudojami kurti skaitmeninius trimačius modeliu- tai informacija naudinga įvairioms programoms. Šie prietaisai yra plačiai naudojami topografiniuose darbuose, kalnakasyboje, fasadų matavimams, pastatų inventorizacijai, miestų modeliavimui. Taip pat ši technologija apima pramoninio dizaino, protezavimo, prototipų kūrimo, kokybės kontrolės tikrinimo funkcijas. Darbe išanalizuoti lazerinis skeneris Riegl LMS-Z420i, jo parametrai bei funkcijos, matavimo technologija ir palyginta matavimo sparta, tikslumas ir duomenų apdorojimas su elektroniniu tacheometru Sokkia set 5x. Atlikus palyginimą lazerinis skeneris... [toliau žr. visą tekstą] / Magister thesis is to analyze the 3D laser measurement systems, the use of geodetic work and compared with an electronic tachometer having. The study was theoretical and practical use of data and systematic analysis. The object of the stationary-laser scanner Riegl LMS-Z420i. The selected device is so far the only one in Lithuania. Modern technology with the latest technical solutions for its performance are receiving an increasing larger role in geodesy. Therefore, it is necessary to know the principles of operation and usability. 3D laser measurement system in relation to electronic tachometer is a new thing. 3D laser measurement system - a device, 3D scanners, which examines real-world object and its environment in order to collect data about its shape and its appearance (ie color). The data collected can be used to create digital three-dimensional model, this information is useful for various applications. These devices are widely used for topographical works, mining, facade measurements, building inventory, urban simulation. Also, this technology include industrial design, prosthetics, prototype development, quality control inspection functions. The paper analyzed a laser scanner Riegl LMS-Z420i, its parameters and functions, measurement techniques and compared the measurement speed, accuracy and data processing with an electronic tacheometer having Sokkia Set 5x. After a comparison of laser scanner Riegl LMS-Z420i has superior electronic tachometers Sokkia Set 5x.

Title: Collaborative Supply Chain Performance Measurement Systems. A multiple case study on the OTD-process of manufacturing SMEs in the Swedish lighting industry. Authors: Arvid Svensson, Frida Gustafsson and Julien Guillaume. Background: Even though the multiple stated benefits of Supply Chain Performance Measurement Systems (SCPMS) to enhance the collaboration, there is a lack of research, especially regarding the presence among Small and Medium-sized Enterprises (SME). Closely associated with the presence of a SCPMS are the challenges. Research on SCPMS and the accompanied challenges have been made in multiple fields and contexts. Yet, SCPMS in the Order to Delivery (OTD)-process between a SME lighting manufacturer and their key customers is missing. Purpose: The purpose of this thesis is to investigate to what level collaboration regarding SCPMS is present in the OTD-process among the cases studied as well as explain this level of collaboration by studying the challenges of SCPMS. The aim is to contribute to existing literature with an explanatory model that highlights the challenges for a highly collaborative SCPMS with their key customers. This model should also give practical contributions to the case companies. Method: A multiple case study have been conducted. Qualitative data has been gathered through semi-structured interviews. Findings and Conclusion: The findings show that the level of collaboration in the SCPMS differs from no presence at all to an almost total high presence in the cases studied. The criteria that were found in previous literature for high collaboration in the SCPMS were overall similar to the practices found in the cases. Most of the challenges found in previous research were able to explain the difference in level of collaboration in the SCPMS. The two major challenges were lack of knowledge and lack of will. Lack of knowledge was present where the will to progress was clear, while also in one case, there was not even a will to progress. Overall, the company with low level and will to progress was most likely to perceive challenges, while the company with the highest level perceived the least challenges.

Os ensaios laboratoriais para avaliação técnica ou estudo de material de irrigação envolvem a medição de diversas grandezas, bem como o monitoramento e controle das condições de ensaio. Qualquer sistema de medição e controle naturalmente apresenta instabilidades que podem afetar a qualidade dos resultados de ensaio, implicando em aumento da incerteza no processo de medição. A implementação do Controle Estatístico de Qualidade pode ser promissora para detecção de causas externas de variação, avaliação da variação máxima permitida aos dados de um processo e discriminação das principais componentes de variabilidade de um sistema de medição. Nesse sentido, considerando a hipótese de possibilidade de aprimoramento da qualidade dos resultados de ensaios, a presente pesquisa teve por objetivo utilizar técnicas de controle estatístico de qualidade e análise de sistemas de medição para avaliar o grau de adequação de bancadas de ensaio de emissores de microirrigação, aperfeiçoar os sistemas de medição e controle adotados nas bancadas e diagnosticar a porcentagem de contribuição dos fatores inerentes aos sistemas de medição e controle na variabilidade total das medidas de vazão em ensaios de uniformidade. A pesquisa foi conduzida no Laboratório de Ensaios de Material de Irrigação (LEMI/INCTEI/ ESALQ/USP). Foram elaborados gráficos de controle de Shewhart, média móvel exponencialmente ponderada (MMEP), além de índices de capacidade para o processo de medição da pressão de ensaio, monitoramento de temperatura da água e vazão, consideradas como as variáveis características da qualidade para ensaios de determinação das curvas de vazão em função da pressão de entrada e uniformidade de vazão de emissores de microaspersão e gotejamento. Além disso, realizou-se estudo de repetitividade e reprodutibilidade (Gage RR) do sistema de medição da vazão, para o qual foram utilizadas 10 repetições, sob três turnos de trabalho (manhã, tarde e noite), com 13 emissores na bancada de microaspersão e 25 emissores na bancada de gotejamento. Não houve influência do turno de trabalho nas medidas de vazão obtidas e o aprimoramento do processo de ajuste da pressão de ensaio pela implantação de um controlador proporcional integrativo-derivativo (PID) ao ensaio de microaspersores foi suficientemente detectado pela aplicação dos gráficos de controle. A pressão e temperatura da água se mantiveram estáveis durante cada ensaio, e não foram identificadas causas não aleatórias de variabilidade na rotina de ensaios. O processo de controle e medição da pressão, para as duas bancadas, foi classificado como\"excelente\" quanto ao desempenho e capacidade de se manter entre os limites de especificação e centralização em relação ao valor de referência (alvo desejado). Como esperado, a variabilidade entre emissores foi a componente de maior contribuição na variância total da vazão, correspondendo a 95,47% e 96,77% para microaspersão e gotejamento, respectivamente. A repetitividade e reprodutibilidade do sistema de medição de vazão (Gage RR) foi \"aceitável\" para as duas bancadas, com as respectivas contribuições de 4,53% e 3,23%, em relação à variância total, associados às incertezas do Gage RR. / Laboratory tests for technical evaluation or irrigation material testing involve the measurement of various greatnesses, as well as monitoring and control of test conditions. Any measurement and control system naturally presents instabilities that can affect the quality of the test results, resulting in increased measurement uncertainty. The implementation of the Statistical Quality Control may be promising for detecting causes of variation non-random, evaluation of the tolerance permitted to data of the process and breakdown of the main variability components of a measuring system. In this sense, considering the hypothesis of possibility of improving the quality of test results, the present study aimed at using statistical quality control techniques and measurement systems analysis to assess the reliability of test benches of microirrigation emitters, improve measurement and control systems adopted in the benches and to diagnose percentage of contribution of the factors inherent in the measurement and control systems in the total variability of flow measurements on uniformity tests. The research was carried in Laboratório de Ensaios de Material de Irrigação (LEMI/INCTEI/ ESALQ/USP). Shewhart control charts were developed, exponentially weighted moving average (EWMA), and capability index for the process of measuring the test pressure, temperature monitoring of water and flow, regarded as the quality variables for determination the flow curves as a function of inlet pressure and uniformity of flow for microsprinkler emitters and drip. In addition, it was made study of repeatability and reproducibility (Gage RR) of flow measurement system for which were used 10 repetitions in three work shifts (morning, afternoon and evening), with 13 emitters in the microsprinkler\'s bench and 25 emitters in the drip bench. There wasn\'t influence of the work shift in the obtained measures for flow and the improvement of the adjustment process of the test pressure for the implementation of the integrative-derivative proportional controller (PID) to microsprinklers test was sufficiently detected by control charts. The pressure and water of temperature remained stable during the tests and weren\'t identified non-random causes of variability in routine tests. The process control and measurement of pressure was classified \"excellent\" to performance and capability to remain in the range of specification and centralization in relation to the reference value (desired target), to the two benches. As expected, the variability between emitters was the greater contribution component in the total variance of flow, corresponding to 95.47% and 96.77% for microsprinkler and drip, respectively. The repeatability and reproducibility for flow measurement system (Gage RR) was \"acceptable\" for the two benches, with the contributions respective of 4.53% and 3.23% relative to the total variance, associated with uncertainties of Gage RR.

Além do fato de as organizações se encontrarem em ambientes turbulentos com rápidas e radicais mudanças, soma-se a importância que se tem dado à questão da implementação das ações estratégicas nas empresas. Assim justifica-se uma análise mais cuidadosa para entender como as empresas podem buscar a implementação bem sucedida de suas ações de melhoria e mudança, alinhando-as e integrando-as aos seus objetivos e metas estratégicos. Para tratar essa questão, esta pesquisa propõe uma sistematização para o processo de gestão de melhoria e mudança de desempenho. Entretanto, agir não significa simplesmente mudar, mas sim tomar ações para a melhoria e mudança na direção que a própria empresa escolheu para seguir, ou seja, sua estratégia. Porém, para uma efetiva gestão da implementação da estratégia, a organização deverá ter um sistema para avaliação e medição do seu desempenho. Dessa forma, este trabalho está estruturado, inicialmente, com uma discussão teórica sobre os temas estratégia, gestão de melhorias e mudanças e medição do desempenho organizacional. Com o embasamento teórico, é realizada uma proposta de um modelo para a gestão de melhorias e mudanças estratégicas, que é detalhada em processos e atividades. Com o objetivo de analisar o caráter prático dessa proposta conceitual, foi desenvolvido um estudo de caso em uma empresa considerada “caso de sucesso" em seu processo de gestão de melhoria. Pôde-se notar a importância de se ter um processo estruturado e sistematizado para gerenciar a melhoria e mudança, entretanto, o desenvolvimento desse processo deve assumir a realidade e entender as características particulares de cada empresa / Besides the fact of organizations finding themselves in a turbulent environment with fast and radical changes, the importance they have given to the subject of strategic actions implementation is becoming higher. Then, it has justified a more careful analysis to understand how companies can reach a successful implementation of their improvement and change actions, aligning and integrating them into their objectives and strategic goals. To treat that subject, this research proposes the systematization to the process of performance improvement and change management. However, acting does not simply means changing, but taking actions in order to reach improvement and change in the direction chosen by the own company, in other words, their strategy. However, for an effective management of the strategy implementation, the organization should have a performance evaluation and measurement system. In that way, this work is based, initially, on a theoretical discussion about themes like strategy, improvements and changes management and performance management. After this, a model of improvement and strategic change management is proposed, which is detailed in process and activities section. A case study was developed within a company considered “success case" with the objective of analyzing the practical character of this conceptual proposal. It was noticed the importance of having a structured and systematized process to manage improvements and changes. However, the development of this process should assume the company’s reality to understand its peculiars characteristics

Le travail présenté dans ce mémoire concerne le développement d'outils pour le diagnostic non-destructif et sans contact de l’état (dégradation) des matériaux de construction, principalement du béton. La thèse est focalisée sur deux techniques d’évaluation utilisant la propagation des ondes ultra-sonores : l'étude de la propagation des ondes de surface et l'analyse des coefficients de réflexion en fonction de l'angle d'incidence (réflectométrie). La partie théorique du travail présente les bases de la modélisation des phénomènes considérés, ainsi que la mise en oeuvre des modèles décrits dans la résolution des problèmes inverses. Un logiciel utilisant des algorithmes d'optimisation pour l'identification des paramètres du modèle sur la base des données de mesure est développé dans le cadre ce travail. La partie expérimentale présente le développement de deux systèmes de mesures ainsi que leur utilisation en laboratoire et sur le terrain. Le but de cette partie est non seulement de développer des outils expérimentaux mais aussi de les rendre opérationnels pour une utilisation courante. Les applications des outils développés pour le diagnostic sont discutées sur la base d'exemples de résultats obtenus en laboratoire et in situ. Ils permettent de spécifier les paramètres tels que la profondeur de la dégradation, la vitesse des ondes de surface et des ondes transversales en fonction de la profondeur pour le matériau testé ainsi que la perméabilité de surface, la porosité et la tortuosité du matériau testé. / The present work concerns the development of tools for non-destructive and non-contact diagnostic of state (degradation) of construction materials, mainly concrete. Attention is focused on two complementary techniques using the propagation of ultrasonic waves, i.e. the study of surface waves propagation and the analysis of reflection coefficients as a function of incidence angle (reflectometry). The theoretical part of the thesis shows the foundations of modelling the considered phenomena, as well as the implementation of the described models in solving the inverse problems. Software developed for this work uses optimization algorithms for identification of model parameters based on the measurement data. The chapters concerning the experimental work shows the construction of two measurement systems developed according to assumptions, including their possible use in both laboratory and field conditions. Applications of the developed diagnostic tools are discussed based on the examples of the results obtained in the laboratory and for the real objects. They allow to specify the parameters such as the depth of degradation, velocity of surface and S-waves as functions of the depth for the tested material and surface permeability, porosity and tortuosity of tested material.