## 2 Background
### Smart Readiness Indicator
An SRI can be defined as a parameter that simply provides information on the readiness of any given building concerning the three aspects mentioned in the above definition of smartness: namely, the technical operation of the building, the external environment (communication with the grid), and the residents of the building. It was introduced in 2018 via the European Parliament where the main objective for SRI was set as \"an indicator which should be able to measure a building's capacity to use information and communication technologies electronic systems to adjust to occupant needs and the grid to improve energy efficiency and performance\". In the two years of its existence, there have been various studies implementing the SRI framework [1], and some common issues relating to the subjective nature of the framework have been pointed out. The SRI was developed to create a framework that assesses a building's technological readiness to interact with the occupants, energy grids, and its ability to be energy efficient in its operations through the use of ICT technologies. For this purpose, SRI focuses on three key areas: namely, occupant needs, interaction with the grid, and energy-efficient operation. To initiate the development of the SRI framework, a total of two technical studies were organized. The first technical study [23] came up with the actual definition and draft methodology for the framework. The SRI framework largely depends on an inventory of smart-ready services that could be present in a building and an inspection of functionalities these services can offer. There is a degree of'smartness' to which these functionalities operate. This means from manual control to an automated system with a feedback loop. Some important terminologies related to the SRI framework are domains, impacts, and functionalities. As previously stated, functionalities are the degrees of smartness. The services in any given building operate in certain domains and have an impact on certain areas. To include all the domains and the impact areas, a multi-criteria framework was developed in the first technical study. The total domains and impact areas are presented in Table 1.  
The associated functionality levels vary for each domain. In some domains, there are a maximum of four functionality levels starting from zero. In some other domains, there are only three levels of functionality. The SRI assessment is flexible in a way in that its assessment can either be completed by an individual with a checklist (a brief assessment) or it can be completed by an expert (a detailed assessment). For SRI assessment, the first step is to determine the building type and climate zone. After selecting the appropriate smart service catalogue, domains present in the building are identified, and their respective functionality levels are assessed. All the activities up to this point are manual and require user interaction. In the next step, actual domain scores are allotted as per services available in the building. These scores are expressed as a percentage of the actual rating and the highest possible rating. A sum of all the domains and impact areas is then taken. As per weightage, the average of the impact areas is taken to calculate the scores for three main impact areas (occupant needs, interaction with the grid, and energy-efficient operation). Lastly, a final average is taken to calculate the SRI score. The detailed step-by-step SRI assessment is presented in [31]. Multiple studies have been conducted ever since the introduction of the SRI framework in 2018. The framework is still in the process of improvement, as the available literature suggests that it might be too subjective [32]. Additionally, it encourages the utilization of digital technologies and electronic systems in buildings, potentially leading to future fire hazards that necessitate attention and resolution [33]. However, for this paper, the focus will be on the type of data that can be taken from an SRI assessment file to develop the RS.