Denna studie syftar till att beskriva prestandatest av feta klienter, ibland också kallade skrivbordsapplikationer. Studien syftar även till att kartlägga testverktyg som kan användas för att utföra prestandatest av feta klienter och att identifiera vilka egenskaper som anses vara viktiga kriterier för dessa testverktyg. Undersökningen är skapad som en fallstudie som undersökningsstrategi där fallets utgångspunkt är Trafikverkets behov men undersökning och dess resultat kan även appliceras på andra verksamheter där testarbete utförs. Både kvalitativ och kvantitativ datainsamling användes i undersökningen genom intervjuer och dokumentstudier samt enkätformulär. Då insamlat data i undersökningen är av både kvalitativ och kvantitativ form så användes också en blandning av en kvalitativ tematisk analys och kvantitativ dataanalys. En del av analysen är en utvärdering av ett testverktygsurval mot sammanställda kriterier, en kriteriebaserad utvärderingsmetod. Tillvägagångssättet för val och utvärdering av testverktyg som tillämpats genom studien är baserat på tidigare befintliga teorier som funnits genom litteraturstudier. Litteraturstudierna har även stått till grund för att definiera undersökningens centrala begrepp och bidrar till resultat genom en jämförelse med insamlat data. Resultatet från undersökningen bidrar med ett beslutsunderlag för verksamheter som står inför ett val av testverktyg för prestandatest av feta klienter och en utvärdering av dessa innan licenser införskaffas. Undersökningen bidrar även med en karakterisering av prestandatest av feta klienter. I just detta fall var de mest passande testverktygen för syftet HP LoadRunner samt två testverktyg från eggPlant i kombination (eggPlant Functional och eggPlant Performance). / The aim of this study is to describe performance testing on thick clients, sometimes also referred to as desktop applications. Another aim with this study is to map out a selection of testing tools that can be used for performance testing of thick clients and to identify what qualities that is considered to be important criteria for these testing tools. The study is based on the research strategy called case study where the case is grounded the needs from Trafikverket but the results from this study could be applied on other business organizations that works with testing. Both qualitative and quantitative data collecting methods where used in this study, in the form och interviews, document studies and questionnaires. Since the collected data in the study where in both qualitative and quantitative form the use of a mix between a qualitative thematical data analysis and a quantitative data analysis had to be done. A part of the analysis was an evaluation on a selection of testing tools towards a compiled list of criteria, as an evaluation method based on criteria. The course of action for choosing and evaluation a testing tool that has been applied throughout the study is based on preexisting theories that has been found through reviews of literature. The reviews of literature have also been the ground for defining the central concepts of the study and contributes to the result by comparing what’s been found in literature to the collected data. The result of the study contributes with a basis for decision for companies and organizations that is in the process of getting a testing tool for performance testing thick clients och how to evaluate these before obtaining the testing tool licenses. The study also contributes with a characterization of performance testing thick clients. In this particular case, the most suitable testing tools came to be HP LoadRunner and also two testing tools from eggPlant combined (eggPlant Functional and eggPlant Performance).

As advances in thin films are made there is a parallel requirement to develop equipment capable of measuring their properties accurately and consistently. In addition there is a need to understand the parameters that are measured. Typical DPI measurements allow both the refractive index (related to density) and the thickness of the adsorbed layer to be calculated with relatively few assumptions, to a very high precision in real time. This thesis presents the research undertaken to develop multiple path length dual polarisation interferometry (MPL-DPI) and absorption enhanced dual polarisation interferometry (AE-DPI). In addition research is presented that can be used to improve the interpretation of the measured parameters for inhomogeneous films and uniaxial films. The new Interferometric technique MPL-DPI allows the thickness and refractive index of in situ and ex-situ coated ultra-thin films to be measured. The procedures and the mathematics required to calculate the properties of films have been described and the technique verified. The technique was demonstrated using films of PMMA, where good agreement was found with complementary techniques. Furthermore, some key features of MPL-DPI were demonstrated using the measurements of interfacially grafted acrylic acid. The absorption enhanced DPI uses the attenuation of the light within the waveguide, due to the light absorbing properties of a film on its surface. As the composition of a film changed, it was shown that the refractive index and extinction coefficients could be used to separate the mass of the components of the film that absorbed light, from the components of the film that did not. With the use of a semi-uniaxial model, the extra data from the attenuation in two polarisations was used to fit the extraordinary and ordinary extinction coefficients. The extraordinary and ordinary extinction coefficients were used to demonstrate that molecular orientation could be implied. The influence that an inhomogeneous film has on the measured thickness, refractive index and extinction coefficient fitted by homogeneous models were investigated. Formulas are presented to explain the thickness, refractive index and extinction coefficient of the measured film. A formula for the total mass per unit area that uses the refractive index was created to account for films that contain molecules of different refractive index increments (dn/dc's). To separate the mass of the individual molecular species from the total mass per unit area, formulas that use the extinction coefficient were derived so molecules that absorb light could be separated from those that do not. The mass calculated from the refractive index and the mass calculated from the extinction coefficient were also examined for uniaxial films. For uniaxial films both measures of the adsorbed mass were found to be relatively accurate and benefited from a partial cancellation of errors. The accuracy of the measurements made by dual polarisation interferometry technology is systematically examined throughout this thesis. Improvements in the calibration routines are suggested and a procedure for the identification and reduction of errors in the phase and contrast is demonstrated.