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2 Annals of Computer Science and Information Systems

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Required quality of service attributes in the context of various types of web services

Iwanow Maksymilian, Dudycz Helena, Michalak Krzysztof

Annals of Computer Science and Information Systems

2022

Vol. 32

261--267

Nowadays, many business units are based on network solutions on the Internet. Various industry branches are entering the Web and offering their services. Customers differ a lot in terms of what services quality requirements they want to be ensured. Functional conditions are defined at the level of business process implementation, but quality issues are also very important there. This study concerns the analysis of non-functional requirements for different groups of users of Web Services. The main objective is to identify differences in user expectations in the context of distinct services offering various functionalities on the Internet. The research was carried out via a systematic literature review within the Web of Science database using keyword chains. As a result of this work, 21 publications describing case studies of the implementation of Web Services and their qualitative attributes were identified. In the context of 20 different types of Web Services, a total of 23 quality attributes were listed.

Identification of heuristics forassessing the usability of websites of public administration units

Dudycz Helena, Krawiec Łukasz

Annals of Computer Science and Information Systems

2019

Vol. 18

651--657

A very important aspect of modern websites is their usability. Thanks to modern, and constantly developing technologies it is possible to create user-friendly services for each user. The usefulness of online services may be considered in terms of their functionality, clarity, and accessibility. It is particularly important that these criteria are met by public administration websites. The aim of this paper is to present the most common usability errors identified on the websites of public administration units as well as to indicate the links between particular types of problems and traditional heuristics of Jakob Nielsen. The survey was conducted by evaluating the websites of the Public Information Bulletin in Poland (BIP, which stands for "Biuletyn Informacji Publicznej''), which are supposed to provide universal access to public information by the citizens of the country. A heuristic method (based on J. Nielsen's heuristics) was used to evaluate 60 websites. The errors obtained were grouped into 14 categories. Each of the error groups was assessed by an expert in terms of its importance for the overall assessment of the website's usefulness. The analysis of relations between the identified categories of errors and heuristics of Jakob Nielsen indicates a need for specifying heuristics in the context of evaluating the usability and availability of public administration websites.