This page has only limited features, please log in for full access.
Tomislav Martinec works as a postdoctoral researcher at the Faculty of Mechanical Engineering and Naval Architecture, University Zagreb. He worked as a teaching assistant from 2014 until 2019, when he attained his PhD degree at the same institution. His primary fields of research in recent years include information traceability and visualisation in product development, management of relations between engineering objects, teamwork in the conceptual design stage, and functional analysis of technical systems. He is a member of the Design Society. Since 2014 he has actively participated in the organisation of the DESIGN conference.
The presented research aims at modelling and formalising the process of team design activity as an interplay between the evolution of design problems and solutions. The motivation founds primarily on a presumption that there exist regularities in designing which can be captured and formalised using the appropriate models. The study thus investigates whether the identified design operation proportions and sequence probabilities are consistent throughout the different parts of team conceptual design activities. It does so by exploring the utility of mathematical models built based on the correlations and statistically significant sequences underlying the previously identified designing patterns. The developed mathematical model was tested by replicating moving-average analyses of design operation proportions and sequences, which were originally observed in the protocol analysis study. A close fit was found between the simulated and the observed data, particularly in providing insights regarding operation patterns and proportion trends. The presented models and modelling methodology are potentially an appropriate means for the next steps in describing, and consequently predicting and supporting team design activity dynamics.
Tomislav Martinec; Stanko Škec; Fanika Lukačević; Mario Štorga. MODELLING PROPORTIONS AND SEQUENCES OF OPERATIONS IN TEAM DESIGN ACTIVITIES. Proceedings of the Design Society 2021, 1, 2187 -2196.
AMA StyleTomislav Martinec, Stanko Škec, Fanika Lukačević, Mario Štorga. MODELLING PROPORTIONS AND SEQUENCES OF OPERATIONS IN TEAM DESIGN ACTIVITIES. Proceedings of the Design Society. 2021; 1 ():2187-2196.
Chicago/Turabian StyleTomislav Martinec; Stanko Škec; Fanika Lukačević; Mario Štorga. 2021. "MODELLING PROPORTIONS AND SEQUENCES OF OPERATIONS IN TEAM DESIGN ACTIVITIES." Proceedings of the Design Society 1, no. : 2187-2196.
The article describes an attempt to address the automatized evaluation of student three-dimensional (3D) computer-aided design (CAD) models. The driving idea was conceptualized under the restraints of the COVID pandemic, driven by the problem of evaluating a large number of student 3D CAD models. The described computer solution can be implemented using any CAD computer application that supports customization. Test cases showed that the proposed solution was valid and could be used to evaluate many students’ 3D CAD models. The computer solution can also be used to help students to better understand how to create a 3D CAD model, thereby complying with the requirements of particular teachers.
Nenad Bojcetic; Filip Valjak; Dragan Zezelj; Tomislav Martinec. Automatized Evaluation of Students’ CAD Models. Education Sciences 2021, 11, 145 .
AMA StyleNenad Bojcetic, Filip Valjak, Dragan Zezelj, Tomislav Martinec. Automatized Evaluation of Students’ CAD Models. Education Sciences. 2021; 11 (4):145.
Chicago/Turabian StyleNenad Bojcetic; Filip Valjak; Dragan Zezelj; Tomislav Martinec. 2021. "Automatized Evaluation of Students’ CAD Models." Education Sciences 11, no. 4: 145.
The conventional prescriptive and descriptive models of design typically decompose the overall design process into elementary processes, such as analysis, synthesis, and evaluation. This study revisits some of the assumptions established by these models and investigates whether they can also be applied for modelling of problem-solution co-evolution patterns that appear during team conceptual design activities. The first set of assumptions concerns the relationship between performing analysis, synthesis, and evaluation and exploring the problem and solution space. The second set concerns the dominant sequences of analysis, synthesis, and evaluation, whereas the third set concerns the nature of transitions between the problem and solution space. The assumptions were empirically tested as part of a protocol analysis study of team ideation and concept review activities. Besides revealing inconsistencies in how analysis, synthesis, and evaluation are defined and interpreted across the literature, the study demonstrates co-evolution patterns, which cannot be described by the conventional models. It highlights the important role of analysis-synthesis cycles during both divergent and convergent activities, which is co-evolution and refinement, respectively. The findings are summarised in the form of a model of the increase in the number of new problem and solution entities as the conceptual design phase progresses, with implications for both design research and design education.
Tomislav Martinec; Stanko Škec; Marija Majda Perišić; Mario Štorga. Revisiting Problem-Solution Co-Evolution in the Context of Team Conceptual Design Activity. Applied Sciences 2020, 10, 6303 .
AMA StyleTomislav Martinec, Stanko Škec, Marija Majda Perišić, Mario Štorga. Revisiting Problem-Solution Co-Evolution in the Context of Team Conceptual Design Activity. Applied Sciences. 2020; 10 (18):6303.
Chicago/Turabian StyleTomislav Martinec; Stanko Škec; Marija Majda Perišić; Mario Štorga. 2020. "Revisiting Problem-Solution Co-Evolution in the Context of Team Conceptual Design Activity." Applied Sciences 10, no. 18: 6303.
Sketching-related activities are considered as an essential form of communication in the early phases of a design process. In the presented study, it is argued that both the sketching and the sketch-related verbalisations are reflected in the level of elaboration of the sketching outputs. Hence, a protocol study was conducted to analyse the frequencies of different sketching-related activities during team conceptual design sessions and the associated levels of elaboration for each of the sketching outputs in the form of concept drawings. The results show that although teams generate sketches of various number, complexity and clarity, there exist commonalities across the studied experiment sessions. For example, teams share a pattern of developing solutions without transformations or using lateral transformations within the first part of the sessions and using vertical transformations to produce final concepts towards the end of the sessions. Moreover, teams used associated sketch elements to start drawing new sketches and then alternated to other activities, most of all verbal explanation, for the sake of elaboration and better understanding.
Marija Nikolić; Stanko Škec; Tomislav Martinec; Nikola Horvat. The Role of Sketching Activities and Outcomes in Conceptual Design Phase. Proceedings of the Design Society: International Conference on Engineering Design 2019, 1, 399 -408.
AMA StyleMarija Nikolić, Stanko Škec, Tomislav Martinec, Nikola Horvat. The Role of Sketching Activities and Outcomes in Conceptual Design Phase. Proceedings of the Design Society: International Conference on Engineering Design. 2019; 1 (1):399-408.
Chicago/Turabian StyleMarija Nikolić; Stanko Škec; Tomislav Martinec; Nikola Horvat. 2019. "The Role of Sketching Activities and Outcomes in Conceptual Design Phase." Proceedings of the Design Society: International Conference on Engineering Design 1, no. 1: 399-408.
Use of virtual reality (VR) is considered beneficial for reviewing 3D models throughout product design. However, research on its usability in the design field is still explorative, and previous studies are often contradictory regarding the usability of VR for 3D model review. This paper argues that the usability of VR should be assessed by analysing human factors such as spatial perception and taking into consideration the complexity of the reviewed product. Hence, a comparative evaluation study has been conducted to assess spatial perception in desktop interface-based and VR-based review of 3D models of products with different levels of complexity. The results show that participants in VR more could perceive the fit of user interface elements, and estimation of the model dimensions had a lower relative error than in desktop interface. It has been found that various sensory cues are used to perceive the model size and that the employed sensory cues depend on the level of complexity. Finally, it is proposed that differences between a desktop interface and VR for reviewing models are more evident when reviewing models of higher complexity levels.
Nikola Horvat; Stanko Škec; Tomislav Martinec; Fanika Lukačević; Marija Majda Perišić. Comparing Virtual Reality and Desktop Interface for Reviewing 3D CAD Models. Proceedings of the Design Society: International Conference on Engineering Design 2019, 1, 1923 -1932.
AMA StyleNikola Horvat, Stanko Škec, Tomislav Martinec, Fanika Lukačević, Marija Majda Perišić. Comparing Virtual Reality and Desktop Interface for Reviewing 3D CAD Models. Proceedings of the Design Society: International Conference on Engineering Design. 2019; 1 (1):1923-1932.
Chicago/Turabian StyleNikola Horvat; Stanko Škec; Tomislav Martinec; Fanika Lukačević; Marija Majda Perišić. 2019. "Comparing Virtual Reality and Desktop Interface for Reviewing 3D CAD Models." Proceedings of the Design Society: International Conference on Engineering Design 1, no. 1: 1923-1932.
This paper presents the results of computational experiments aimed at studying the effect of experience on design teams’ exploration of problem-solution space. An agent-based model of a design team was developed and its capability to match theoretically-based predictions is tested. Hypotheses that (1) experienced teams need less time to find a solution and that (2) in comparison to the inexperienced teams, experienced teams spend more time exploring the solution-space than the problem-space, were tested. The results provided support for both of the hypotheses, demonstrating the impact of learning and experience on the exploration patterns in problem and solution space, and verifying the system's capability to produce the reliable results.
Marija Majda Perisic; Tomislav Martinec; Mario Storga; John S Gero. A Computational Study of the Effect of Experience on Problem/Solution Space Exploration in Teams. Proceedings of the Design Society: International Conference on Engineering Design 2019, 1, 11 -20.
AMA StyleMarija Majda Perisic, Tomislav Martinec, Mario Storga, John S Gero. A Computational Study of the Effect of Experience on Problem/Solution Space Exploration in Teams. Proceedings of the Design Society: International Conference on Engineering Design. 2019; 1 (1):11-20.
Chicago/Turabian StyleMarija Majda Perisic; Tomislav Martinec; Mario Storga; John S Gero. 2019. "A Computational Study of the Effect of Experience on Problem/Solution Space Exploration in Teams." Proceedings of the Design Society: International Conference on Engineering Design 1, no. 1: 11-20.
Studies of design activity have been dominantly reporting on different aspects of the design process, rather than the content of designing. The aim of the presented research has been the development and application of an approach for a fine-grain analysis of the design content communicated between designers during the team conceptual design activities. The proposed approach builds on an engineering design ontology as a foundation for the content categorisation. Two teams have been studied using the protocol analysis method. The coded protocols offered fine-grain descriptions of the content communicated at different points in the design session and enabled comparison of teams’ approaches and deriving some generalisable findings. For example, it has been shown that both teams focused primarily on the use of the developed product and the operands within the technical process, in order to generate new technical solutions and initial component design. Moreover, teams exhibit progress from abstract to concrete solutions as the sessions proceeded and focused on the functional requirements towards the end of the sessions.
Tomislav Martinec; Stanko Škec; Jelena Šklebar; Mario Štorga. Applying Engineering Design Ontology for Content Analysis of Team Conceptual Design Activity. Proceedings of the Design Society: International Conference on Engineering Design 2019, 1, 2467 -2476.
AMA StyleTomislav Martinec, Stanko Škec, Jelena Šklebar, Mario Štorga. Applying Engineering Design Ontology for Content Analysis of Team Conceptual Design Activity. Proceedings of the Design Society: International Conference on Engineering Design. 2019; 1 (1):2467-2476.
Chicago/Turabian StyleTomislav Martinec; Stanko Škec; Jelena Šklebar; Mario Štorga. 2019. "Applying Engineering Design Ontology for Content Analysis of Team Conceptual Design Activity." Proceedings of the Design Society: International Conference on Engineering Design 1, no. 1: 2467-2476.
The purpose of the study is to model the micro-scale process patterns which can be identified during team conceptual design activities. A state-transition model has been developed and used to empirically investigate the patterns of design operations during two types of team conceptual design activities: ideation and concept review. The presented work builds on the perception of design problems as ill-defined and implies that conceptual design activities involve the simultaneous development of problems and solutions using three distinctive design operations—analysis, synthesis, and evaluation. The three design operations have been defined as fine-grain design steps performed by design teams when exploring the content of both the problem and the solution dimensions of the design space. Moreover, design operations have been conceptualised as transitions between states of the explored design space, thus providing a basis for the state-transition model. The model’s ability to map and visualise proportions of design operation sequences emerging during ideation and concept review has facilitated the identification of both the activity-specific patterns and patterns that were likely to appear during both types of empirically investigated activities. The two activities exhibited similar patterns, such as alternation of solution synthesis and analysis, sequences of synthesis, analysis and evaluation within solution space, and the potential co-evolution episodes. Nevertheless, divergent traits have been identified for ideation, and convergent traits for concept review, based on the significant differences in proportions of design operations and their sequences.
Tomislav Martinec; Stanko Škec; Nikola Horvat; Mario Štorga. A state-transition model of team conceptual design activity. Research in Engineering Design 2019, 30, 103 -132.
AMA StyleTomislav Martinec, Stanko Škec, Nikola Horvat, Mario Štorga. A state-transition model of team conceptual design activity. Research in Engineering Design. 2019; 30 (1):103-132.
Chicago/Turabian StyleTomislav Martinec; Stanko Škec; Nikola Horvat; Mario Štorga. 2019. "A state-transition model of team conceptual design activity." Research in Engineering Design 30, no. 1: 103-132.
The paper represents an explorative step in studying the effect of problem-solving styles on verbal engagement in teams solving a conceptual design task. The selection of VIEW problem-solving style assessment framework provided assumptions on how different style dimensions could affect verbal engagement. The assumptions were tested by setting up a protocol study where teams composed of members with different problem-solving styles solved a conceptual design task. The results of the protocol analysis have revealed the potential effects and provided directions for further research steps.
Tomislav Martinec; Nikola Horvat; Stanko Škec; Mario Štorga. VERBAL ENGAGEMENT IN TEAMS SOLVING A CONCEPTUAL DESIGN TASK. Proceedings of the DESIGN 2018 15th International Design Conference 2018, 2075 -2086.
AMA StyleTomislav Martinec, Nikola Horvat, Stanko Škec, Mario Štorga. VERBAL ENGAGEMENT IN TEAMS SOLVING A CONCEPTUAL DESIGN TASK. Proceedings of the DESIGN 2018 15th International Design Conference. 2018; ():2075-2086.
Chicago/Turabian StyleTomislav Martinec; Nikola Horvat; Stanko Škec; Mario Štorga. 2018. "VERBAL ENGAGEMENT IN TEAMS SOLVING A CONCEPTUAL DESIGN TASK." Proceedings of the DESIGN 2018 15th International Design Conference , no. : 2075-2086.
T. Martinec; Stanko Škec; T. Savsek; M.M. Perisic. Work sampling for the production development: A case study of a supplier in European automotive industry. Advances in Production Engineering & Management 2017, 12, 375 -387.
AMA StyleT. Martinec, Stanko Škec, T. Savsek, M.M. Perisic. Work sampling for the production development: A case study of a supplier in European automotive industry. Advances in Production Engineering & Management. 2017; 12 (4):375-387.
Chicago/Turabian StyleT. Martinec; Stanko Škec; T. Savsek; M.M. Perisic. 2017. "Work sampling for the production development: A case study of a supplier in European automotive industry." Advances in Production Engineering & Management 12, no. 4: 375-387.