Hacaloğlu, Tuna

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https://hdl.handle.net/20.500.14411/7244
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Hacaloğlu,T.
H.,Tuna
T., Hacaloğlu
T.,Hacaloğlu
Hacaloglu, Tuna
Tuna, Hacaloğlu
Hacaloglu,T.
T., Hacaloglu
H., Tuna
Tuna, Hacaloglu
T.,Hacaloglu
Hacaloğlu, Tuna
Hacaloglu T.
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Doktor Öğretim Üyesi
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tuna.hacaloglu@atilim.edu.tr
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Information Systems Engineering
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56422190200
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KHJ-3791-2024

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IEEE Software2
CEUR Workshop Proceedings -- Joint of the 33rd International Workshop on Software Measurement and the 18th International Conference on Software Process and Product Measurement, IWSM-MENSURA 2024 -- 30 September 2024 through 4 October 2024 -- Montreal -- 2044672
18th IFIP WG 6.11Conference on e-Business, e-Services, and e-Society (I3E) -- SEP 18-20, 2019 -- Norwegian Univ Sci & Technol, Fac Informat Technol & Elect Engn, Dept Comp, Trondheim, NORWAY1
45th Euromicro Conference on Software Engineering and Advanced Applications (SEAA) / 22nd Euromicro Conference on Digital System Design (DSD) -- AUG 28-30, 2019 -- Kallithea, GREECE1
48th Euromicro Conference on Software Engineering and Advanced Applications -- AUG 31-SEP 02, 2022 -- SPAIN1
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Now showing 1 - 10 of 28
  • Thumbnail Image
    Conference Object
    Citation - WoS: 7
    Citation - Scopus: 12
    Utilization of Three Software Size Measures for Effort Estimation in Agile World: A Case Study
    (IEEE, 2022) Unlu, Huseyin; Hacaloglu, Tuna; Buber, Fatma; Berrak, Kivilcim; Leblebici, Onur; Demirors, Onur
    Functional size measurement (FSM) methods, by being systematic and repeatable, are beneficial in the early phases of the software life cycle for core project management activities such as effort, cost, and schedule estimation. However, in agile projects, requirements are kept minimal in the early phases and are detailed over time as the project progresses. This situation makes it challenging to identify measurement components of FSM methods from requirements in the early phases, hence complicates applying FSM in agile projects. In addition, the existing FSM methods are not fully compatible with today's architectural styles, which are evolving into event-driven decentralized structures. In this study, we present the results of a case study to compare the effectiveness of different size measures: functional -COSMIC Function Points (CFP)-, event-based - Event Points-, and code length-based - Line of Code (LOC)- on projects that were developed with agile methods and utilized a microservice- based architecture. For this purpose, we measured the size of the project and created effort estimation models based on three methods. It is found that the event-based method estimated effort with better accuracy than the CFP and LOC-based methods.
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    Conference Object
    Software Change Size Measurement: an Exploratory Systematic Mapping Study
    (CEUR-WS, 2024) Hacaloglu, T.; Küçükateş Ömüral, N.; Kılınç Soylu, G.; Demirörs, O.
    Change in software projects can occur through various channels. Customers may request modifications or new features; appraisal activities such as reviews or testing may uncover issues that necessitate adjustments, or products may need to adapt to changes in their operating environment. Therefore, it is essential to assess these changes explicitly and objectively within the scope of software engineering activities. Specifically, quantifying change by measuring its size is crucial for successful management, as without a meaningful metric, it is impossible to accurately assess its impact on the project's effort, schedule, and cost. This study aims to explore the concept of change in software engineering literature, with a particular emphasis on the methods used to measure its size. The study reveals that the current literature on this topic is still in its early stages and the measurement and estimation of changes remain challenging throughout both development and maintenance phases. According to the reviewed articles, size is primarily used for effort estimation. Various software artifacts from different stages of the Software Development Life Cycle (SDLC) serve as input for change measurement, highlighting the need for a versatile size measurement applicable across all SDLC phases. Most of the reviewed articles interpret change in the context of maintenance activities. This research sets a benchmark for the status of software size measures for software change and highlights related problems to suggest further research topics. © 2024 Copyright for this paper by its authors.
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    Conference Object
    Citation - Scopus: 7
    Challenges of using software size in agile software development: A systematic literature review
    (CEUR-WS, 2018) Hacaloglu,T.; Demirors,O.
    Software size is a fundamental measure for software management. Size is used for a variety of purposes, such as benchmarking, normalization, and portfolio measurement, and it is frequently considered as the sole input of estimation. Estimations can be produced for various reasons; e.g., to predict effort, cost and duration of software development projects. There are different types of software size measures. Particularly in projects where agile methodologies are adopted, measurement becomes a significant challenge as it is perceived as a non-value-added task and records of tasks such as requirements identification are not always consistent. The difficulties of applying traditional size measurement techniques in agile contexts, however, do not diminish the need, and new methods and techniques are introduced to improve the manageability of the agile projects. In this paper, we discuss estimation and measurement approaches in relation with ―software size in agile contexts. Based on this review, we present the perceptions of software size and related challenges, such as misinterpretation of size, difficulties in implementation, and acceptability of the measurement processes. We anticipate that providing a baseline for the state of software size measures in agile contexts and presenting related challenges, particularly in terms of its acceptability by practitioners can shed light on the development of new techniques. © 2018 CEUR-WS. All rights reserved.
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    Article
    Demografik Tavsiye Sistemlerine Yönelik Bir Model
    (Bilim ve Teknoloji, 2013) Hacaloğlu, Tuna; Özkan Yıldırım, Sevgi
    İnternet kullanımının dünya çapına yayılması ve bunun sonucu olarak web içeriğindeki sürekli artış kullanıcılara onları daha çok ilgilendirecek daha kişiselleştirilmiş ürün ve servis sunma ihtiyacı doğurmuştur. Özellikle e-ticaretin de gelişmesiyle artık hemen hemen her şirket müşterilerine web üzerinden hizmet sunmaktadır. Buna bağlı olarak son yıllarda web üzerinde gezinmedeki değişiklik dikkat çekici bir hale gelmiştir. Eskiden web siteleri kullanıcılara herkese aynı olacak şekilde genel ürünler sunmaktaydı. Bunun sonucunda kullanıcılar web sitesinin kendilerine sundukları ürünler arasından bir seçim yapmak zorunda kalıyorlardı. Günümüzde ise web siteleri kullanıcılarına uyum göstermeye başladılar ve kullanıcılarının bir takım özelliklerini dikkate alarak, genel seçenekler yerine onları daha çok ilgilendiren özel seçenekler sunar hale geldiler. Web’i çok büyük bir bilgi havuzu olarak düşündüğümüzde kullanıcının kendisi için gerekli olan bilgiyi bulmak için gerekli olmayan başka bilgilerle de karşı kalabileceğini görürüz. Bilgi diye adlandırdığımız; film, TV programı, reklam, müzik, kitap, tatil alternatifleri, eğitim, ders materyalleri, blog makaleleri, mobilya, giysi, vb. gibi web de sunulan her tip üründür. Bu bağlamda tavsiye sistemlerini kullanıcıların ihtiyaçlarına göre ürün veya servis öneren sistem olarak tanımlayabiliriz [1]. Bu tür tavsiye sistemlerinin dikkate aldıkları kullanıcı özellikleri kullanıcıların yaş, eğitim, cinsiyet, meslek ve yaşadıkları şehir gibi genellikle sabit olan demografik bilgileri olabilirken; kullanıcıların sistemle etkileşimleri geçmişte aldıkları, inceledikleri ürünler, gezindikleri web siteleri gibi dinamik veriler de olabilir. Bunun yanında söz konusu kullanıcılarla benzer özellik gösteren diğer kullanıcılar veya aynı kullanıcının daha önce almış olduğu ürün ile diğer ürünler arasındaki benzerlikler hep tavsiye sistemlerinin temelinde çalışan bir takım akıllı algoritmalar ile tespit edilmekte ve bu sayede kullanıcılara daha özel ve onları ilgilendirecek ürünler sunulmaktadır. Dolayısıyla bu sistemler hem tüketici hem de üretici için fayda sağlamaktadır.
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    Conference Object
    Citation - Scopus: 1
    A Survey on Cosmic Students Estimation Challenge
    (CEUR-WS, 2022) Hacaloglu,T.; Say,B.; Unlu,H.; Omural,N.K.; Demirors,O.
    Software project management is a significant software engineering practice that is highly related to achieving software-specific project goals. This study aims to share students’ perceptions of incorporating an international software estimation challenge called “COSMIC Students’ Estimation Challenge” into a software project management course. For this aim, students were taught the COSMIC Functional Size Measurement method and entered the competition. After the competition, a questionnaire asking for the students’ opinions was collected. The objective of the research is to get an insight into to what extent incorporating this type of competition activity -a challenge- can contribute to students’ learning perceptions. In the long run, the findings can contribute to creating a foresight about making the necessary curriculum arrangements to form a more up-to-date and dynamic education plan by including the methods applied in the software industry in Software Engineering education. The results suggest that this kind of competition experience and preparation is helpful for students to learn the COSMIC method. © 2020 Copyright for this paper by its authors.
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    Conference Object
    Citation - Scopus: 8
    An Exploratory Case Study on Effort Estimation in Microservices
    (Institute of Electrical and Electronics Engineers Inc., 2023) Unlu,H.; Hacaloglu,T.; Omural,N.K.; Caliskanel,N.; Leblebici,O.; Demirors,O.
    Software project management plays an important role in producing high-quality software, and effort estimation can be considered as a backbone for successful project management. Size is a very significant attribute of software by being the only input to perform early effort estimation. Even though functional size measurement methods showed successful results in effort estimation of traditional data-centric architectures such as monoliths, they were not designed for today's architectures which are more service-based and decentralized such as microservices. In these new systems, the event concept is highly used specifically for communication among different services. By being motivated by this fact, in this study, we looked for more microservice-compatible ways of sizing microservices using events and developed a method accordingly. Then, we conducted an exploratory case study in an organization using agile methods and measured the size of 17 Product Backlog Items (PBIs) to assess how this proposed method can be useful in effort estimation in microservices. The implication from the case study is that despite performing a more accurate effort estimation using the proposed size measurement than COSMIC, we were unable to significantly outperform using the total number of events. However, our suggested approach demonstrated to us a different way to use software size in terms of events, namely, to determine the coupling complexity of the project. This finding can be beneficial specifically when evaluating the change requests. © 2023 IEEE.
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    Conference Object
    Cosmic Light Vs Cosmic Classic Manual: Case Studies in Functional Size Measurement
    (CEUR-WS, 2020) Hacaloglu,T.; Unlu,H.; Demirors,O.; Abran,A.
    Functional size has been used in software engineering for more than 40 years. When measured early in the software development life cycle, it can serve as direct input for effort estimation. The COSMIC Functional Size Measurement (FSM) method developed by the Common Software Measurement Consortium (COSMIC) is the latest ISO-compliant functional sizing method. A streamlined manual titled ''Software Development Velocity with COSMIC Function Points'' summarizes the measurement process and shortens the learning time. The aim of this study is to compare the classic COSMIC FSM manual and this new “light” manual in terms of accuracy of the resulting FSM applied to case studies. The findings show that use of the light manual results in accurate measurement. In addition, there were no significant time differences between the two. With respect to the variations in COSMIC Function Points (CFP) values in the two case studies, they three causes were identified: the Object of Interest (OOI) concept and corresponding data groups, details regarding Functional Process Independence, and Error/Confirmation messages related to the scope of the information included in the manuals. Copyright © 2020 for this paper by its authors.
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    Conference Object
    Citation - WoS: 3
    Citation - Scopus: 4
    Users' Behavioral Strategies Toward Mobile App Problems: Fight or Flight
    (Springer international Publishing Ag, 2019) Inal, Yavuz; Hacaloglu, Tuna
    In this paper, we identify two distinct behavioral strategies for dealing with problems encountered in the use of mobile apps - fight or flight. In the fight strategy, individuals do not give up using an app when faced with a problem; rather, they experiment with different ways to cope with that problem, whereas the flight strategy refers to the user's decision to uninstall an app when they encounter a problem and/or their intention to use an alternative app. These strategies were identified from an analysis of documents, which forty-two users reported, and can be used to understand how users deal with encountered problems. The participants were asked to use a mobile app of their choice for one week and report the behavioral strategies they utilized to counter problems they experienced. According to the findings obtained from content analysis, the most reported complaints concerned the categories of interface design, functional error, feature request, and feature removal. The participants who complained about functional errors, frustrating features, and slow application speed stopped using the app (flight behavior) whereas those that were dissatisfied with the interface, a missing feature or the content of the app continued to use the app and tried to overcome the problems (fight behavior).
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    Article
    Citation - WoS: 3
    Citation - Scopus: 6
    An Exploratory Case Study Using Events as a Software Size Measure
    (Springer, 2023) Hacaloglu, Tuna; Demirors, Onur
    Software Size Measurement is a critical task in Software Development Life Cycle (SDLC). It is the primary input for effort estimation models and an important measure for project control and process improvement. There exist various size measurement methods whose successes have already been proven for traditional software architectures and application domains. Being one of them, functional size measurement (FSM) attracts specific attention due to its applicability at the early phases of SDLC. Although FSM methods were successful on the data-base centric, transaction oriented stand-alone applications, in contemporary software development projects, Agile methods are highly used, and a centralized database and a relational approach are not used as before while the requirements suffer from a lack of detail. Today's software is frequently service based, highly distributed, message-driven, scalable and has unprecedented levels of availability. In the new era, event-driven architectures are appearing as one of the emerging approaches where the 'event' concept largely replaces the 'data' concept. Considering the important place of events in contemporary architectures, we focused on approaching the software size measurement problem from the event-driven perspective. This situation guided us to explore how useful event as a size measure in comparison to data-movement based methods. The findings of our study indicates that events can be promising for measurement and should be investigated further in detail to be formalized for creating a measurement model thereby providing a replicable approach.
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    Article
    Citation - WoS: 16
    What We Know About Software Test Maturity and Test Process Improvement
    (Ieee Computer Soc, 2018) Garousi, Vahid; Felderer, Michael; Hacaloglu, Tuna
    [No Abstract Available]