Journal of
the Architectural Institute of Korea

Monthly
  • ISSN : 2733-6239(Print)
  • ISSN : 2733-6247(Online)

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A Study on the Importance and Satisfaction Characteristics in Certified Workplaces Using Importance-Performance Analysis

유선주(You, Seon-Ju) ; 김석경(Kim, Suk-Kyung)

https://doi.org/10.5659/JAIK.2026.42.8.3

This study evaluates how occupants perceive and experience broadly defined interior design elements in LEED and G-SEED certified office spaces compared to non-certified offices. While previous research has primarily focused on building performance metrics, this investigation centers on user experience by examining the relationship between occupants’ expectations and their actual satisfaction with various interior design features. Using Importance-Performance Analysis (IPA), the gap between users’ prioritization of specific interior design elements and their satisfaction with these elements in practice is assessed. The analysis shows that several key features, such as noise control, natural lighting, and VOC-emitting materials management, fall predominantly into the second quadrant of the IPA matrix, indicating high importance but low satisfaction. Comparison reveals that certified offices generally achieve higher overall satisfaction, although certain user-centered interior aspects still require improvement. These findings suggest that current whole-building certification systems may not fully capture interior user satisfaction. Future workplace planning may benefit from incorporating interior-specific evaluation criteria, such as LEED ID+C, to better enhance user experience.

A Study on the Balance between Visual Information Delivery and Citizens’ Perceived Visual Burden in Urban Media Facades

김지현(Kim, Ji-Hyun) ; 남성우(Nam, Seong-Woo) ; 김원필(Kim, Won-Pil)

https://doi.org/10.5659/JAIK.2026.42.8.15

Media facades are increasingly used as urban building envelopes, yet existing evaluations have focused mainly on resolution and aesthetics, with limited attention to how installation and material conditions affect information delivery and perceived visual burden. This study examines the balance between information delivery and citizens’ perceived visual burden in urban media facades. Using six still-image stimuli (I01-I06) representing different installation methods, facade types, and spatial contexts, a follow-up online survey of Korean adults yielded 150 valid responses. Information-delivery performance (IDI), derived from prior C/L/A ratings, was integrated with perceived burden measures?fatigue, glare, light-pollution/annoyance?and acceptability. Within the six-stimulus set, higher C/L/A levels generally accompanied higher fatigue and glare, especially in attention-grabbing displays. Some configurations achieved high information delivery with lower visual burden, forming a “high-efficiency, low-burden” group, whereas certain LED systems on opaque facades tended toward “high-efficiency, high-burden” over-stimulation. By integrating IDI and FBI at the stimulus level, this study proposes a framework for balancing information performance and citizen comfort. The findings support luminance/contrast control, facade/content guidelines, and urban lighting policies. The IDI-FBI relationship should therefore be interpreted at the aggregated stimulus level rather than as evidence of individual-level causality.

A Comparative Study on Plan types and Spatial Composition of Traditional Houses in Korea and Japan: Focused on the 田-Shaped Plan

유재우(Yoo, Jae-Woo) ; 서예은(Seo, Ye-Eun) ; 홍지완(Hong, Ji-Wan)

https://doi.org/10.5659/JAIK.2026.42.8.27

This study compares the plan types and spatial composition of 田-shaped traditional houses in Korea and Japan. Traditional houses on the Korean Peninsula show diverse regional characteristics, with single-barrel and double-barrel plans coexisting according to climatic and topographical conditions. In contrast, Japanese traditional houses are generally based on double-barrel plans, in which residential areas and earthen-floor work areas are systematically combined. This study analyzed 130 Korean traditional house plans, mainly from mountainous regions such as Gangwon-do and northern Gyeongsangbuk-do, and 94 Japanese traditional house plans selected from Minka of Japan: Farmhouses and Rural Settlements, published by the Architectural Institute of Japan. The plans were redrawn and classified according to the composition of residential and work areas, the number of bays and barrels, the location of earthen-floor spaces, and regional distribution. The results show that Japanese 田-shaped houses developed into various plan types through internal expansion and functional differentiation after the relaxation of house-size restrictions in the Meiji period. In Korea, 田-shaped houses were concentrated mainly in mountainous regions and showed stronger regional characteristics. Although similarities were found in the combination of residential and earthen-floor areas, the two countries differed in the direction of spatial expansion, the scale of house plans, and the relationship between plan type and regional environment. This study provides a basic framework for comparative research on traditional houses in East Asia by interpreting 田-shaped plans as a common analytical type.

A Study on the Analysis of Eco-friendly Perception and Influencing Factors of Industrial Facilities Based on Demographic Characteristics

류수훈(Ryu, Soo-hoon) ; 박열(Park, Yeol)

https://doi.org/10.5659/JAIK.2026.42.8.39

The purpose of this study is to analyze planning factors reflecting the specific characteristics of industrial facilities and to propose effective evaluation indicators to ensure eco-friendliness throughout the life cycle of these facilities. For the research method, a survey was conducted on 301 individuals, including manufacturing workers and the general public, to investigate perceptions of eco-friendliness and the importance of evaluation items within the Green Standard for Energy and Environmental Design (G-SEED). The collected data were statistically processed using SPSS for descriptive statistics, mean comparison, correlation, and regression analysis. The results revealed a perception that while industrial facilities have a high impact on environmental pollution, their level of environmental consideration is very low, leading to a high demand for the establishment of separate certification standards for industrial facilities. In particular, 'Materials and Resources' and 'Maintenance' were identified as core areas. By selecting key influencing factors for each category?such as the ecological value of the site, solar control planning, and the installation of resource storage facilities?this study provides a theoretical basis for developing future eco-friendly certification indicators for industrial facilities

Supply Characteristics of Residential Facilities by Location, Housing Type, and Household Size

김준(Kim, Jun) ; 임성훈(Lim, Sung-Hun)

https://doi.org/10.5659/JAIK.2026.42.8.49

This study examines the characteristics of residential development in Busan Metropolitan City according to location and housing type. The analysis includes 25,462 cases comprising 1,108,362 households, representing approximately 70 percent of the city’s housing stock. Residential developments were classified into 10 locational types, 9 housing types, and 12 development-size categories based on the number of households. The results show that residential development in Busan expanded rapidly around 1990 through the growth of built-up areas in the city center and large-scale residential land development in peripheral areas. Apartments account for nearly 70 percent of the housing stock, while non-apartment housing, particularly low-rise multi-family housing, makes up most of the remaining share. Since the 2000s, newer housing types such as studio-type residential buildings, officetels, high-rise mixed-use residential complexes, and urban compact housing have increasingly replaced traditional non-apartment housing demand. In terms of development size, housing supply is largely divided into small-scale developments with fewer than 19 households and large-scale developments with more than 55 households, while mid-sized developments with 20 to 54 households show distinct spatial and temporal patterns. Low-rise multi-family housing was mainly supplied before the 2000s in hillside and older inner-city areas. In contrast, urban lifestyle housing has been concentrated in flat areas and newly developed districts since the 2000s. Newer housing types are also clustered in central commercial districts and urban expansion areas.

Current Practices and Improvement Strategies of the Proposal Competition as an Architect Evaluation Method

염철호(Youm, Chirl-Ho)

https://doi.org/10.5659/JAIK.2026.42.8.61

Since 2014, Korea’s proposal-based selection method for public architectural projects has expanded to a level comparable with conventional design competitions. Although it was introduced to select architects based on experience, capabilities, and execution plans rather than design schemes, its actual operation remains unclear. This study examines its current implementation and identifies areas for improvement. Design competitions announced in 2025 were analyzed by building function, construction type, client type, and design fee range. Proposal tasks and submission requirements were reviewed based on compliance criteria, and Japan’s proposal system was examined to identify institutional differences in task definition, submission requirements, and evaluation methods. The results show that proposal competitions accounted for 42.5 percent of all design competitions and were most common in educational, research, medical, welfare, and community facilities, as well as non-new construction projects, education office and public institution projects, and projects with design fees below 400 million KRW. However, 49.0 percent included requirements inconsistent with the system’s intent. Requirements such as elevations, drawings, perspective images, presentation panels, or cost breakdowns often resulted in submissions similar to those of conventional design competitions. These findings suggest the need to clarify proposal task criteria, restrict design-oriented submission requirements, structure evaluation methods more clearly, and strengthen pre-announcement review.

A Study on the Spatial Organization of Piazzas in Reggio Emilia Educational Facilities

박민용(Park, Minyong)

https://doi.org/10.5659/JAIK.2026.42.8.73

This study aims to investigate the spatial organizational characteristics of the piazza, a core space in Reggio Emilia educational facilities, from the typological perspective of Italian Rationalism. While the environment is emphasized as the “third teacher” in the Reggio Emilia approach, many educational facilities in South Korea remain confined to functionalist corridor-based layouts, limiting the realization of relational and interactive learning environments. To address this limitation, this study reinterprets the piazza not merely as a central hall, but as an urban-derived spatial structure that organizes relationships within the architectural system. The research methodology consists of three steps: first, establishing a theoretical framework based on Italian Rationalist architectural theory and the spatial philosophy of the Reggio Emilia approach; second, analyzing the conceptual transition of the piazza from an urban context to an educational facility; and third, conducting case studies of four representative Reggio Emilia facilities in Italy. The findings reveal that the piazza functions as a collective spatial device that structures relationships among educational units, rather than as a fixed functional space. In particular, three key spatial principles are identified: (1) centrality and integrated spatial organization structured around the piazza, (2) visual permeability that enhances spatial continuity and social interaction, and (3) flexibility as a collective place accommodating diverse activities and events. This study contributes to bridging architectural urban theory and contemporary educational philosophy by reinterpreting educational facilities as a “small city” grounded in the urban typological logic of Italian Rationalism, and provides architectural guidelines for the spatial reconfiguration of childcare and educational environments.

Visual Conspicuity Assessment of National Location Number Signs Using Image-Based Paired Comparison

오하늘(Oh, Ha-Neul) ; 강석진(Kang, Seok-jin)

https://doi.org/10.5659/JAIK.2026.42.8.81

Hiking trails are natural environments where background color and luminance vary according to vegetation density, spatial structure, and the presence of facilities. These variations can influence the visibility of National Location Number signs during emergency situations. However, empirical research on the performance of the current standardized color scheme under different background conditions remains limited. This study evaluates the visual conspicuity of sign colors across various hiking trail environments using an image-based paired comparison method. A total of twenty-five background images representing five types of hiking trail conditions were combined with eight sign colors, including four safety colors defined in KS S ISO 3864 and four achromatic colors. Data collected from 49 participants were analyzed using the TrueSkill algorithm and two-way ANOVA. The results show that color significantly affects visual conspicuity. Yellow demonstrated the highest and most consistent visibility across all background conditions, followed by white and red, whereas achromatic colors consistently showed low conspicuity. Background condition also had a significant effect, with higher conspicuity observed in environments featuring partially clear boundaries and shrub-dominant vegetation. In addition, significant interaction effects were identified, indicating that the conspicuity of green, white, and black changes depending on vegetation composition and the presence of facilities.

A Study on the Regional Characteristics of Cement Joints in Jeju Stone Houses

조성민(Jo, Seong-Min) ; 백지숙(Baek, Ji-Sook) ; 이용규(Yi, Yong-Kyu)

https://doi.org/10.5659/JAIK.2026.42.8.93

This study investigates the transformation of modern construction technologies and production systems in Jeju Island during the 1970s through an analysis of doljip (traditional stone houses) featuring cement joints. The research aims to clarify the structural and aesthetic characteristics of Jeju’s stone architecture by examining changes in masonry and joint techniques. A typological and field-based approach was applied, combining literature review, aerial and street-view surveys, and on-site interviews with residents and craftsmen in eight villages of western Jeju. The findings reveal that the production of doljip evolved from a traditional community-based cooperative system, where villagers directly quarried and stacked local stones, into a specialized and segmented construction process involving external suppliers and professional plasterers. Cement joints, which initially served as simple fillers, developed into decorative architectural elements, exhibiting geometric and expressive patterns that enhanced the facades of both residential and non-residential buildings. This transition reflects the interplay between technological modernization, economic growth driven by the tangerine industry, and the diffusion of construction knowledge during the late 1970s. The study highlights Jeju’s stone houses as a cultural medium that embodies the region’s architectural innovation, collective labor tradition, and socio-economic modernization process.

A Study on the Housing Condition Analysis of Elderly Residents in Public Rental Housing for Aging in Place Support

조승연(Cho, Seungyeoun) ; 우수진(Woo, Sujin)

https://doi.org/10.5659/JAIK.2026.42.8.101

This study examines the housing conditions of elderly residents in public rental housing and explores policy directions to support aging in place in Korea. Using raw data from a national survey of long-term public rental housing, it analyzes 2,211 households that included at least one resident aged 65 or older. The study compares differences by age group, region, and housing type in terms of residential satisfaction, safety accident experience, intention to move, and welfare service needs. The findings show that late-old residents reported higher residential satisfaction and lower intention to move, but greater dependence on welfare facilities and services. Safety accidents were more common among late-old residents, permanent rental housing tenants, and residents in non-metropolitan areas. In particular, late-old residents in permanent rental housing outside metropolitan areas were identified as a highly vulnerable group. The study suggests that future housing policy should go beyond physical improvements alone and adopt an integrated approach that combines age-friendly housing modifications, welfare service linkages, and improved community accessibility to better support aging in place.