## 2 Theoretical Background  
### Home Services AI Agent Evolution and HRI Theory-Based Interactions  
An intelligent agent can be defined as software that is able to interact with its environment and the user to collect and utilize data for the purpose of making its own decisions and performing the correct task at the optimum time [10]. When applied in the home environment, intelligent agents are often combined with multiple smart home services and can make predictions based on the user's context, performing repetitive and cumbersome tasks on their behalf, and more [11]. These agents can have tangible physical forms or intangible virtual forms, and their utilization can be performed separately or in combination for different purposes. While previously focused on functional roles related to efficiency, such as increasing productivity and reducing costs, the scope of intelligent agents in home services is expanding and diversifying to include the ability to make contextual decisions based on collected data, interact with users, and provide personalized experiences. The following home service areas have been identified as the primary domains for the implementation of intelligent agents: cleaning, entertainment, care, security, energy management, social and communication, and work. The subsequent data as below Table 1 presents these domains in an organized manner, categorized according to their purpose, task, form, and interaction. The robotic form of the agent is proposed as an integrated system that can be managed and controlled in conjunction with a variety of sensors and other devices. The robotic form of the agent is most frequently mentioned in cleaning, care, and social and communication services, which are service areas that require physical assistance or involve a variety of interactions with the user. Other service areas that have been identified include those that recognize the surrounding environment and situation to provide contextual control or information, or to provide integrated, intelligent control of tasks that are difficult for the user to see each time or that require different tasks to be performed individually. The proposition of specific guidelines or methods for interacting with the user is contingent upon the level of visual complexity of the service area. In the case of telework, it was determined that body movements, including those of the head and arms, are a significant factor, given the potential impact of visual factors on interaction, even in the absence of a physical robot. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Area** & **Purpose** & **Agent** & **Interaction** & **Type of Interaction** & **Ref No.** \\ \hline \multirow{3}{*}{Cleaning} & \multirow{3}{*}{Efficiency} & Robot, Integrated System & Context Recognition and Control, Alert & Text, Device Movement & [12] \\ \hline \multirow{3}{*}{Entertainment} & \multirow{3}{*}{Immersion} & Smart Appliances, Smart Furniture, Integrated System & Context Recognition and Control, Alert, Communication & \multirow{3}{*}{Text, Voice} & [13] \\ \cline{3-5}  & & & Context & & \\ \cline{1-1} \cline{3-5}  & & & & & \\ \hline \multirow{3}{*}{Adult Care} & \multirow{3}{*}{Support} & Robot, Integrated System & Recognition, Information & Text, Device Movement & [14] \\ \cline{1-1} \cline{3-5}  & & & Alert & & \\ \hline \multirow{3}{*}{Baby Care} & \multirow{3}{*}{Support} & Robot, Integrated System & Reaction by Context & Voice, Images, Video on Screen, Device Movement & [15,16] \\ \cline{1-1} \cline{3-5}  & & & & & Movement \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Smart home service cases from literature review. As demonstrated in the preceding section, a comprehensive review of the extant literature on intelligent agents in home service areas was conducted, revealing significant variations in interaction design across diverse domains. These variations are attributed to the specific purpose, primary tasks, and agent form and type.