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Wyświetlanie 1-10 z 16
Tytuł:
Technical Debt Aware Estimations in Software Engineering: a Systematic Mapping Study
Autorzy:
Klimczyk, Paweł
Madeyski, Lech
Powiązania:
https://bibliotekanauki.pl/articles/384112.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
software estimation
technical debt
project management
decision making
change impact
Opis:
Context: The Technical Debt metaphor has grown in popularity. More software is being created and has to be maintained. Agile methodologies, in particular Scrum, are widely used by development teams around the world. Estimation is an often practised step in sprint planning. The subject matter of this paper is the impact technical debt has on estimations. Objective: The goal of this research is to identify estimation problems and their solutions due to previously introduced technical debt in software projects. Method: The Systematic mapping study (SMS) method was applied in the research. Papers were selected from the popular digital databases (IEEE, ACM, Scopus, etc.) using defined search criteria. Afterwards, a snowballing procedure was performed and the final publication set was filtered using inclusion/exclusion criteria. Results: 42 studies were selected and evaluated. Five categories of problems and seven proposed solutions to the problems have been extracted from the papers. Problems include items related to business perspective (delivery pressure or lack of technical debt understanding by business decision-makers) and technical perspective (difficulties in forecasting architectural technical debt impact or limits of source code analysis). Solutions were categorized in: more sophisticated decision-making tools for business managers, better tools for estimation support and technical debt management tools on an architectural-level, portfolio approach to technical debt, code audit and technical debt reduction routine conducted every sprint. Conclusion: The results of this mapping study can help taking the appropriate approach in technical debt mitigation in organizations. However, the outcome of the conducted research shows that the problem of measuring technical debt impact on estimations has not yet been solved. We propose several directions for further investigation. In particular, we would focus on more sophisticated decision-making tools.
Źródło:
e-Informatica Software Engineering Journal; 2020, 14, 1; 61-76
1897-7979
Pojawia się w:
e-Informatica Software Engineering Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Role of Organisational Phenomena in Software Cost Estimation: A Case Study of Supporting and Hindering Factors
Autorzy:
Rahikkala, J.
Hyrynsalmi, S.
Leppänen, V.
Porres, I
Powiązania:
https://bibliotekanauki.pl/articles/384055.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
software cost estimation
project management
project success
top management
organisational factors
software improvement
software process maturity
case study
Opis:
Despite the fact that many researchers and practitioners agree that organisational issues are equally important as technical issues from the software cost estimation (SCE) success point of view, most of the research focus has been put on the development of methods, whereas organisational factors have received surprisingly little academic scrutiny. This study aims to identify organisational factors that either support or hinder meaningful SCE, identifying their impact on estimation success. Top management’s role is specifically addressed. The study takes a qualitative and explorative case study based approach. In total, 18 semi-structured interviews aided the study of three projects in three organisations. Hence, the transferability of the results is limited. The results suggest that the role of the top management is important in creating prerequisites for meaningful estimation, but their day-to-day participation is not required for successful estimation. Top management may also induce undesired distortion in estimation. Estimation maturity and estimation success seem to have an interrelationship with software process maturity, but there seem to be no significant individual organisational factors, which alone would make estimation successful. Our results validate several distortions and biases reported in the previous studies, and show the SCE research focus has remained on methodologies and technical issues.
Źródło:
e-Informatica Software Engineering Journal; 2018, 12, 1; 167-198
1897-7979
Pojawia się w:
e-Informatica Software Engineering Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
LibLaura: A Library for Binaural Sound Source Localization
Autorzy:
Kruczkowski, P.
Mąka, T.
Powiązania:
https://bibliotekanauki.pl/articles/114369.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
software library
binaural localization
time delay estimation
Opis:
In this work the software library for binaural sound localization is presented. The main purpose of the library are the applications for localization tasks in audio systems based on two microphones. The implemented mechanisms include binaural single sound source localization, ITD (Interaural Time Difference) and ILD (Interaural Level Difference) cues and support real-time analysis. LibLaura is written in C++ language and is easily extensible to support new features, time delay estimators and user-defined callbacks.
Źródło:
Measurement Automation Monitoring; 2016, 62, 12; 399-401
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wkładu programisty w końcowy kod źródłowy programu
Software developer contribution in the final source code
Autorzy:
Kaczmarek, J.
Wróbel, M.
Powiązania:
https://bibliotekanauki.pl/articles/267098.pdf
Data publikacji:
2013
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
szacowanie nakładu
repozytorium kodu
software engineering
effort estimation
Opis:
Ocena pracy programistów jest zadaniem złożonym. Kierownicy projektów biorą pod uwagę takie czynniki jak jakość tworzonego kodu, zdolność do rozwiązywania problemów technicznych i biznesowych oraz produktywność. Mierzenie produktywności poszczególnych programistów jest jednak zadaniem skomplikowanym. W artykule zostanie przedstawiona nowa metoda oceny wkładu programisty w końcowy kod źródłowy programu. Na podstawie przechowywanej w repozytorium historii wykonanych operacji i zdefiniowanych w metodzie wag określany jest udział poszczególnych programistów w wytworzeniu oprogramowania. W artykule zostaną również przedstawione wyniki walidacji metody przeprowadzone dla dwóch projektów Open Source.
Estimation of the software developers effort is a complex task. Project managers take into account factors such as the quality of the created code, the ability to solve technical and business problems, as well as productivity. However measuring the productivity of individual developers, is very complicated. The article presents a new method of assessing the contribution of the developer in the final source code of the program, which operates on the data stored in code repositories. It will present the results of the method validation conducted on two open source projects.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2013, 36; 93-96
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance of a Software Defined Radio based Non-Coherent OFDM Wireless Link
Autorzy:
Narayana, Nandana
Sure, Pallaviram
Powiązania:
https://bibliotekanauki.pl/articles/27311898.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Software Defined Radio (SDR)
Universal Software Radio Peripheral (USRP)
LabView
LS channel estimation
denoising threshold
Opis:
With improved technological successions, wireless communication applications have been incessantly evolving. Owing to the challenges posed by the multipath wireless channel, radio design prototypes have become elemental in all wireless systems before deployment. Further, different signal processing requirements of the applications, demand a highly versatile and reconfigurable radio such as Software Defined Radio (SDR) as a crucial device in the design phase. In this paper, two such SDR modules are used to develop an Orthogonal Frequency Division Multiplexing (OFDM) wireless link, the technology triumphant ever since 4G. In particular, a non-coherent end-to-end OFDM wireless link is developed in the Ultra High Frequency (UHF) band at a carrier frequency of 470 MHz. The transmitter includes Barker sequences as frame headers and pilot symbols for channel estimation. At the receiver, pulse alignment using Max energy method, frame synchronization using sliding correlator approach and carrier offset correction using Moose algorithm are incorporated. In addition, wireless channel is estimated using Least Square (LS) based pilot aided channel estimation approach with denoising threshold and link performance is analyzed using average Bit Error Rate (BER), in different pilot symbol scenarios. In a typical laboratory environment, the results of BER versus receiver gain show that with 4 pilot symbols out of 128 carriers, at a gain of 20 dB, BER is 0.160922, which is reduced to 0.136884 with 16 pilot symbols. The developed link helps OFDM researchers to mitigate different challenges posed by the wireless environment and thereby strengthen OFDM technology.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 3; 537--544
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A framework for corrosion assessment in metallic structures, from data analysis to risk based inspection
Autorzy:
Cui, Xiaofei
Liang, Xiaoxia
Bharadwaj, Ujjwal
Powiązania:
https://bibliotekanauki.pl/articles/1841787.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
corrosion estimation
steel bridge
metallic structures
risk based inspection
software
Opis:
Metallic corrosion is a big challenge affecting many sectors in a nation’s economy. Necessary corrosion prevention actions have to be taken in order to maintain the integrity of engineering assets susceptible to corrosion. This paper proposes a holistic framework to support the management of corrosion in metallic structures. It is a fully automation corrosion assessment process, with risk updated by Bayesian theory. Through analyzing the thickness data measured by non-destructive testing (NDT) techniques, the influence of corrosion on the component can be estimated using statistical methods, which will enable users to make decisions on maintenance based on quantitative information. A case study using corrosion data from a steel bridge is included to demonstrate the proposed framework. It improved the conventional corrosion analysis method by the proposed statistical approach using representative thickness data, which aims to take full use of the remaining life. This model can be adapted to a wide range of metallic structure suffering from corrosion damage.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 1; 11-20
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elements of Method Improvement of Flood Zones Determination
Autorzy:
Kryzhovets, Tetiana
Powiązania:
https://bibliotekanauki.pl/articles/1833889.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
stochastic models
methods of extreme estimation
optimization problems
software
automated information systems
Opis:
The article suggests a possible application of mathematical modeling zones and flooding characteristics that will improve the methodological basis in hydrological calculations and forecasting will provide opportunities for a better understanding of the complex mechanisms of formation flow. The computational scheme is applicable for vertically homogeneous flow conditions extending from steep river flows to tidal influenced estuaries. The system has been used in numerous engineering studies.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2020, 9, 1; 25--29
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Software Systems Clustering Using Estimation of Distribution Approach
Autorzy:
Tajgardan, M.
Izadkhah, H.
Lotfi, S.
Powiązania:
https://bibliotekanauki.pl/articles/108635.pdf
Data publikacji:
2016
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
Software System
Clustering, Genetic Algorithm
Estimation of Distribution Algorithm (EDA)
Probability Model
Opis:
Software clustering is usually used for program understanding. Since the software clustering is a NP-complete problem, a number of Genetic Algorithms (GAs) are proposed for solving this problem. In literature, there are two wellknown GAs for software clustering, namely, Bunch and DAGC, that use the genetic operators such as crossover and mutation to better search the solution space and generating better solutions during genetic algorithm evolutionary process. The major drawbacks of these operators are (1) the difficulty of defining operators, (2) the difficulty of determining the probability rate of these operators, and (3) do not guarantee to maintain building blocks. Estimation of Distribution (EDA) based approaches, by removing crossover and mutation operators and maintaining building blocks, can be used to solve the problems of genetic algorithms. This approach creates the probabilistic models from individuals to generate new population during evolutionary process, aiming to achieve more success in solving the problems. The aim of this paper is to recast EDA for software clustering problems, which can overcome the existing genetic operators’ limitations. For achieving this aim, we propose a new distribution probability function and a new EDA based algorithm for software clustering. To the best knowledge of the authors, EDA has not been investigated to solve the software clustering problem. The proposed EDA has been compared with two well-known genetic algorithms on twelve benchmarks. Experimental results show that the proposed approach provides more accurate results, improves the speed of convergence and provides better stability when compared against existing genetic algorithms such as Bunch and DAGC.
Źródło:
Journal of Applied Computer Science Methods; 2016, 8 No. 2; 99-113
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Novel Technique of Optimization for the COCOMO II Model Parameters using Teaching-Learning-Based Optimization Algorithm
Autorzy:
Khuat, T. T.
Le, M. H.
Powiązania:
https://bibliotekanauki.pl/articles/309064.pdf
Data publikacji:
2016
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
COCOMO II
cost estimation
NASA software
optimization
teaching-learning-based optimization algorithm
Opis:
Software cost estimation is a critical activity in the development life cycle for controlling risks and planning project schedules. Accurate estimation of the cost before the start-up of a project is essential for both the developers and the customers. Therefore, many models were proposed to address this issue, in which COCOMO II has been being widely employed in actual software projects. Good estimation models, such as COCOMO II, can avoid insufficient resources being allocated to a project. However, parameters for estimation formula in this model have not been optimized yet, and so the estimated results are not close to the actual results. In this paper, a novel technique to optimize the coefficients for COCOMO II model by using teaching-learning-based optimization (TLBO) algorithm is proposed. The performance of the model after optimizing parameters was tested on NASA software project dataset. The obtained results indicated that the improvement of parameters provided a better estimation capabilities compared to the original COCOMO II model.
Źródło:
Journal of Telecommunications and Information Technology; 2016, 1; 84-89
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected methods of cost estimation of ERP systems. Modifications
Wybrane metody wyceny modyfikacji systemów ERP
Autorzy:
Plecka, P
Powiązania:
https://bibliotekanauki.pl/articles/339945.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Zarządzania Produkcją
Tematy:
ERP systems
software modifications
cost estimation
systemy ERP
modyfikacje oprogramowania
wycena kosztów oprogramowania
Opis:
During the sales process of ERP systems, it appears that a set of standard functionality must be extended or modified according to customer requirements. Suppliers are facing of the problem of determining the cost of additional work. The paper presents a non-algorithmic method of software cost estimates. It described three cases of implementation ERP projects using these methods to estimate the cost of the modification. On this basis, analyzed the differences between the estimated and actual values. This article tries to answer the question whether the selecting method of evaluation, suppliers can expect to specified accuracy of estimated values.
W trakcie procesów sprzedażowych systemów ERP okazuje się, że zbiór standardowej funkcjonalności musi być rozszerzony lub zmieniony (zmodyfikowany) zgodnie z wymaganiami klienta. Dostawcy stoją zatem przed problemem określenia kosztów dodatkowych prac. W artykule zaprezentowano niealgorytmiczne metody wyceny kosztów oprogramowania. Opisano trzy przypadki projektów wdrożeniowych wykorzystujących te metody do estymacji kosztów modyfikacji. Na tej podstawie przeanalizowano różnice między szacowanymi i rzeczywistymi wartościami. W artykule można znaleźć odpowiedź na pytanie, czy wybierając metodę oceny można oczekiwać zadanej dokładności estymacji.
Źródło:
Zarządzanie Przedsiębiorstwem; 2013, 16, 4; 27-34
1643-4773
Pojawia się w:
Zarządzanie Przedsiębiorstwem
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 16

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