|
| |
|
|
Test process improvement and software quality assurance models
Došek, Tomáš ; Borovcová, Anna (advisor) ; Buchalcevová, Alena (referee)
Testing often takes between 35 and 50 percent of the total costs of software development projects. Still, the role of testing tends to be underestimated. High costs that are being spent on software testing make a reason for looking for systematical approaches for making the testing processes efficient. Test process improvement models offer such approaches. These models are subject of this thesis. Implementation of process improvement models can be an expensive, long-term activity. Therefore, reasons need to be found, why is important to use such models. Reasons and motivations for using improvement models are demonstrated in the first part of this thesis. It turned out that software testing has, by its historical development, come to the state, when it contains so much theory that companies have a problem absorbing all the knowledge to make testing processes efficient. Therefore, improvement models offer a solution to this problem. This thesis is primarily focused on Test Maturity Model Integration (TMMi), which is being analyzed thoroughly. The work searches for possibilities and limitation of using the model and it summarizes current experiences with the model. Because the TMMi model does not contain a practical assessment method, such method is proposed in this thesis. The assessment method will help organizations using the model. Beside TMMi, the thesis provides an introduction into three other models: Test Process Improvement (TPI), Capability Maturity Model Integration (CMMI) and Critical Testing Processes (CTP). All four models are subject to a comparison based on specified criteria. Results of the comparison are analyzed to identify for which situations individual models suit best. The comparison will help organizations to choose the right model for their needs.
|
|
| |
|
|
Application of the process analysis in quality assurance and software testing
Popelka, Vladimír ; Oškrdal, Václav (advisor) ; Chromek, Ondřej (referee)
This thesis deals with questions regarding quality assurance and software testing. The subject of its theoretical part is the specification of the general concept of quality, description of standards used in the field of software product quality evaluation and finally the evaluation of software development process itself. The thesis intends to introduce the theoretical framework of software quality assurance, especially the detailed analysis of the whole software testing branch. An added value to the theoretical part constitutes the characterization of procedural approach and selected methods used towards the improvement of processes. The practical part of the thesis comprises of the exemplification -- it shows the procedural approach at software quality management, applied to a selected IT company. The main aim of the practical part is to create a purposeful project for optimization of quality assurance and software testing processes. The core of the matter is to accomplish the process analysis of the present condition of software testing methodology. For the purpose of process analysis and optimization project, the models of key processes will be created; these processes will then be depicted based on defined pattern. The description of the state-of-the-art of software product quality assurance processes is further supplemented by the evaluation of such processes maturity. The project for optimization of software testing and quality assurance processes comes from the process analysis of the present condition of software testing methodology, as well as from the evaluation of procedural models maturity. The essence of processes optimization is the incorporation of change requests and innovative intentions of individual processes into the resulting state of methodology draft. For the measurement of selected quality assurance and software testing processes, the configuration of efficiency indicators and their application on particular processes is implemented. The research on the of the state-of-the-art, as well as the elaboration of this whole project for optimization of software testing and quality assurance processes runs in conformity with the principles of DMAIC model of Six Sigma method.
|
|
|
Software quality assurance and Java web applications testing
Nejedlý, David ; Pavlíčková, Jarmila (advisor) ; Šlajchrt, Zbyněk (referee)
The main objective of this work contains descriptions of the attributes that determine the quality of the software, a list of techniques that can ensure the quality of the code, and how to achieve code quality with software testing tools, to introduce available automated testing capabilities, to analyze in detail the testing tools Bromine and Selenium, including practical examples of working with these tools, in the end evaluate the benefits work and opportunities to deploy these tools in practice.
|
|
|
Inspesting the sensitivity and resolution of the CT-part of the Infinia-Hawkeye
FILÁSKOVÁ, Lucie
The medical discipline of nuclear medicine is characterised by the constant development and perfection of the appliances used and thus, also higher diagnostic yield. The most frequently used equipment currently includes hybrid appliances enabling image fusion, e.g. SPECT/CT. The result is a recording combining anatomical and functional information allowing for more accurate localisation of the lesion and better spatial orientation. Equipment in nuclear medicine is subject to inspection under the regulation of the State Office for Nuclear Safety No 307/2002 Coll. On radiation protection and as amended under Regulation No 499/2005 Coll. When inspecting the characteristics of an appliance, procedures specified by the manufacturer are met, and each workplace performing nuclear medicine must follow a sophisticated system of quality control stipulating the individual tests and duration of the cycle when they shall be performed. My work consisted of performing quality tests on the CT-part of the Infinia-Hawkeye system. The testing was performed once every three weeks over a period of seven months at the Department of Nuclear Medicine in České Budějovice hospital. The results of individual readings were recorded in overview charts and compared with the parameters provided by the manufacturer. The performance of the comparison confirmed the defined goals, all the recorded values agreed with the limits set by the manufacturer. These values were never exceeded during the entire testing period. No short-term changes of parameters were recorded. The bachelor?s thesis can be used as an overview of quality tests of the CT-part of the Infinia-Hawkeye system and can also serve as instructions for performing these inspections at all workplaces that are equipped with the Infinia-Hawkeye hybrid system.
|
|
|
Analysis of deviations in the localization of radiation fields in the course of radiation by means of EPID in patients with tumours in head and neck
GRABMÜLLEROVÁ, Hana
Oncology diseases are serious and alarming problems in the world and our country, too. The most common ENT tumours affect larynx, oropharynx and hypopharynx. The factor which causes the occurrence of tumours is smoking. Chronic thermal excitation, pH changes of mucous membrane and vasoconstriction caused by nicotine can also participate in the occurrence of malign changes. Among other etiological factors belong: alcohol, U radiation, ionizing radiation, transport and industry exhalations, nutritional exhaustion, and immunodeficiency. Current treatment includes surgery, radiotherapy, cytostatic chemotherapy, hormone therapy, bio therapy and their combinations. The prosperity of oncology patients is 22% by surgery, 18 % by radiotherapy and 5% by chemotherapy. Radio therapy remains the basic treatment of oncology diseases. According to the newest knowledge and requests its quality is ensured. The accuracy of radiation treatment and the increases in therapeutic results are developed. The risk of over dosing, which leads to the occurrence of many complications, and also the risk of under dosing, which decreases the chance of the complete cure, decline. Quality assurance is currently carried out on electronic portal image device EPID (Electronic Portal Imaging). The reason of permitted small deviation (0,3cm) in tumours of head and neck is the proximity of critical organs to the target volume and often small radiated volumes. The aim of the thesis was the analysis of the group of patients with the tumours of head and neck treated at oncology department in Nemocnice České Budějovice, a.s. (Hospital in České Budějovice Inc.) by the form of portal evaluation. The hypothesis was average deviation 0,3cm in localization of radiated fields in the evaluated group. The analysis of deviations in localization of radiation fields in the course of radiation of evaluated group was carried out. The gained deviations were compared with the data in professional literature. The methodology included the characteristics of evaluated group of patients according to radiation posture, fixation of a patient, radiation technique, localization of tumour, the extent of disease TNM, patient´s age and sex-a man, a woman. The evaluation was carried out by means of EPID for particular radiation fields. Statistically, maximum, minimum and average deviation in localization of radiation fields was evaluated and the results were compared with the hypothesis by means of the test {$\psi$}2. The presupposed hypothesis was not proved. From the measured data it was found out that in practice acquired deviations are smaller than deviations presupposed by the hypothesis. The important part of radio therapeutic practice is the programme of Quality Assurance (QA). The results will serve the workers of radiation oncology in Nemocnice České Budějovice, a.s. (Hospital in České Budějovice Inc.) for evaluation of radiotherapy quality in the tumours of head and neck.
|
|
|
Quality assurance IMRT plans
LOŠKOVÁ, Michaela
We may regard the Intensity-Modulated Radiation Therapy (IMRT) as a break-through and progress concerning the treatment of oncogenous diseases. In practice, this new method experienced an extensive development as early as at the end of 1990s. At the present time, the IMRT is a medical treatment used in an increasingly frequent manner. It concerns predominantly such oncogenous diseases, the treatment of which based on the above-mentioned method is applicable due to the localization of the disease. The IMRT enables a more effective distribution of a dose in the target volume than in case of the conventional radiotherapy. It is also possible to realize maximum treatment of the surrounding healthy tissues. For the purpose of clinical use of the IMRT, however, it is necessary to verify the correspondence between the dose planned and the dose actually realized in the target volume. From the large quantity of correspondence verification methods available, I decided to select the three following ones to be covered in this paper: - portal dosimetry method - measurement using special phantom - measurement using 2D filed of the Seven29 detectors. The goal of my work was to compare these three methods of verification of the IMRT plans and in addition, to verify the applicability of the 3% tolerance criterion for all the above-mentioned methods of verification. The portal dosimetry method is applicable for verification of fluency; it is fully sufficient and not time-consuming for the purpose of clinical use. The measurement using 2D field provides for sufficiently accurate information on a dose{\crq}s distribution in the modulated field, however, it is more time-consuming and the measuring device is not integrated in the system of the radiation apparatus. Verification using special phantom is considerably time-consuming and it provides for information on a dose{\crq}s distribution in a small quantity of points. The DD=3% criterion I selected is applicable to all three methods with the exception of areas with extensive modulation of the dose and areas on the verge of the field.
|
|
|
RADIATION PROTECTION OF PATIENT WITH USING INTENSITY MODULATED RADIOTHERAPY (ImRT) {--} DOSIMETRIC VERIFICATION OF TREATMENT PLAN.
KLEČKOVÁ, Naděžda
Nowadays more and more radiotherapy departments use intensity modulated beams for treatment of patients. Intensity modulated radiotherapy (ImRT) is able to modificate intensity of radiation across the iradiated field. In this way it is posible to achieve better dose conformity than in conventional radiotherapy. Implementation of ImRT allows us to escalate dose to target volume with same side effects of organs at risk as in conventional radiotherapy or to reduce normal tissue complication - decrease dose to organ at risk with the same tumour dose. This fact reguires extension of our guality system to all network of delivery dose to patients, inclusive linear accelerator with multileaf collimator, treatment planning system, electronic portal imaging device and so on. Quality assurance is guaranteed both periodical user tests and independent verification of The State Office for Nuclear Safety. The aim of this work is finding the optimal and effective way for the verification treatment plans, determining criteria for evaluation measured results, proposing summary all aspects of radiation protection patients which are treate ionisation beams with intensity modulated radiotherapy. The optimization one of the principles of radiation protection will be provided by routin verification treatment plans.
|
|
| |
guest ::
