Turkish Statistical Institute (TurkStat) is responsible for monitoring the indicator system of the Sustainable Development 2030 Agenda, compiling and monitoring data, encouraging the production of unavailable indicators and disseminating data, as well as ensuring communication and coordination with national stakeholders and international organizations.

Within the scope of the Sustainable Development 2030 Agenda, responsible and relevant institutions were determined for each indicator and published in the annex of the Official Statistics Programme 2017-2021 and 2022-2026. It is possible to effectively implement the 2030 Sustainable Development Agenda and to monitor it through indicators, for all institutions and organizations to adopt the "2030 Agenda", to include the goals and targets of the Agenda in their corporate strategies, and to take necessary measures to monitor these goals and targets. It requires close cooperation and communication with the institutions and organizations included in the Official Statistics Programme for TurkStat to continue its activities regarding the follow-up and monitoring of indicators that are the basis for determining the level of achievement to sustainable development goals and targets.

The global indicator set was developed by the United Nations, and its purpose is to evaluate the progress towards the 2030 Agenda within the framework of Sustainable Development Goals. Owing to the uniform set of measures, it is possible to make comparisons between countries and regions, as well as present developments globally.

The national indicator set has been developed to monitor sustainable development priorities for each country. In line with the 2030 Agenda, countries are encouraged to set their own sustainable development priorities and measure their implementation with their own set of indicators, taking into account the state of the country.

Reported online – refers to sustainable development indicators that are produced and available for Türkiye.
Exploring data – refers to indicators that the process of exploring the data source is still ongoing or refers to the indicators of which data source has been determined and are currently undergoing data and metadata compilation. When the data compiled as a result of the studies, it will be integrated into the web portal.
Irrelevant indicator – refers to indicators which are invalid for a country or it refers to such indicators which are evaluated as "non-country-related" indicators because the situations that these indicators aim to measure are not available in the relevant country.

Not all indicators proposed by the UN for monitoring the implementation of the 2030 Agenda have a fully developed and internationally accepted methodology that allows them to be calculated. Studies in this field are carried out by specialized international organizations (custodian agencies). National statistical offices can only begin the data source research process for these indicators after the study is finished. Furthermore, in some cases, sustainable development indicators included in the global indicator list, although they have methodologies, are not in the scope of official statistics. Accordingly, "Proportion of girls and women aged 15–49 years who have undergone female genital mutilation/cutting, by age" indicator is irrelevant in terms of monitoring sustainable development in the context of Türkiye.

Official statistics to monitor the situation in Türkiye for sustainable development aims to provide data for the global indicators according to the Fundamental Principles of Official Statistics. Cooperation within this scope is carried out with data producer institutions/organizations. When a suitable data source is identified, the indicators become available and then the web portal is updated (reporting status of the indicator is presented as "Reported online").

Two inventory studies were conducted by TurkStat in order to evaluate the availability of indicators and to obtain information about when unavailable indicators can be produced. Accordingly, an inventory study was conducted to determine the availability of the indicator set (based on 241 indicators before revision) in May 2016. In this inventory study, the producers of the available indicators, data sources, the availability of data disaggregations; for indicators that cannot be produced, potential producers, availability in the short term (3 years), information on production process, presence of proxy indicators and opinions of the producer unit were examined.

The 2nd Inventory Study, conducted in 2019 and finished in the mid of 2020, was carried out using a standard questionnaire. With this study; the changes in the availability of sustainable development indicators in the last three years have been determined and a more accurate national and global monitoring has been ensured, a Road Map has been prepared for the sustainable development indicators that are under the responsibility of all institutions and organizations in the Official Statistics Programme but cannot be produced yet in our country. In the Road Map, indicators that could not be produced were determined, possible responsible organizations were determined, and a production plan was prepared regarding the term to be produced. Accordingly, the availability of unavailable indicators are classified under three categories; short term (0-2 years), medium term (3-4 years), long term (5-8 years).

National official statistics are the data source for most of the indicators presented in the UN global database. For some indicators, relevant international organizations produce estimated data or recalculate the data sent by countries to ensure international comparability and use their own methodologies for this purpose. In the case of data recalculated by international organizations in the global database, there might be differences between these data and the data on the national SDGs platform.

In the process of identifying the list of indicators in this web portal, global indicators are included to the greatest extent. In cases where global indicator is absent, proxy indicators were included in the list, which is regarded as relevant to the target and function as substitute of the global indicator. Proxy indicators are displayed with the letter (p). Differences between global indicator and proxy indicator may occur in various situations; for example, a particular proxy indicator does not contain all the components of the global indicator or denotes different coverage. Due to the unavailability of the global indicator, the presentation of proxy indicators by countries also remains in accordance with the 2030 Agenda.

The global indicators measuring the existence or degree of a particular legislation or strategy etc. are called as “non-statistical indicators” and are reported at the global level by the United Nations institutions responsible for the indicator (custodian agencies). Such indicators are compiled through questionnaires prepared and sent to national focal points by custodian agencies. In the questionnaire, answers are usually coded as “0-1”, “Yes-No” or “Exists/Not Exists”, and the country's indicator data is either presented directly in this coded way or presented as a score by giving certain points due to these codings. Sometimes, the indicator data can be reported as the number of countries that have the related legislation or strategy. For example, if the country has implemented a legal regulation on a specific subject, the related indicator can be reported with a value of 100 points/score; if the country has not implemented the legal regulation, it can be reported with a value of 0 points/score.

Visual data are presented in the form of line and bar charts on the SDGs portal. In most cases, line charts are used for visualization. This form of presentation is a suitable representation of changes in value over time. Bar charts are useful for comparing discrete data or showing trends over time. These charts also apply to indicators derived from surveys conducted every two years or less frequently.