Database

Good Practices in Social Security

Database

Good Practices in Social Security

ISSA Database of Good Practices

This database provides ISSA members with privileged access to good practices, showcasing creative, smart and innovative ways to overcome challenges of social security administration at the institutional, national or international levels. Explore, be inspired by, and learn from these hard-earned and well-deserved successes of the ISSA members. Learn more about the ISSA Good Practices.

The map shows the first 100 results for the selected criteria.

Implementation year:
2018
Award Year:
2021
Social Protection Fund
,
Oman
,
Asia and Pacific

The purpose of the project is to ensure the risk and return of the investment portfolio of the Public Authority for Social Insurance (PASI) of Oman meets its target to maintain the sustainability of the scheme in order to provide the required benefits to pensioners.

The PASI risk scoring methodology is as follows:

Topic:
Investment
Implementation year:
2018
Award Year:
2021
General Organization for Social Insurance
,
Saudi Arabia
,
Asia and Pacific

Masdr Data Solution Company is a company owned by the General Organization of Social Insurance (GOSI) of Saudi Arabia. It was established in 2018 with the goal to utilize the labour market data and enhance the social and economic welfare. GOSI views Masdr as an opportunity to better serve society and contribute to the digital transformation inspired by the 2030 Vision. The establishment of Masdr has increased GOSI’s customer satisfaction as it shortened and eased the service delivery journey.

Topic:
Governance and administration
Information and communication technology
Investment
Service quality
Implementation year:
2017
Award Year:
2023
Social Security Fund
,
Libya
,
Africa

In early 2012, the Libyan Centre for Consultancies and Human Development (LCCHD, hereafter the Centre) was assigned to carry out the task of conducting the annual Training Needs Assessment (TNA) and delivering quality training for all Social Security Fund (SSF) employees across Libya.

Topic:
Employment
Human resource management
Investment
Service quality
Implementation year:
2017
Award Year:
2021
Civil Service Employees Pension Fund
,
Oman
,
Asia and Pacific

The Civil Service Employees Pension Fund (CSEPF) is a service organization providing social protection to Omani citizens working in the public sector in Oman, the Gulf Cooperation Countries and elsewhere.

CSEPF established its Risk Department, which led to:

Topic:
Governance and administration
Investment
Implementation year:
2017
Award Year:
2017
Derrama Magisterial
,
Peru
,
Americas

The Derrama Magisterial (DM) has begun offering a number of services in accordance with the terms of its Statutes, and one noteworthy scheme involves providing credit to member teachers at a preferential rate of interest. Such credit, along with other types of investment, helps support the organization, and contributes above all to providing pension-related benefits to member teachers and their dependents. 

Topic:
Service quality
Actuarial
Implementation year:
2017
Award Year:
2021
General Organization for Social Insurance
,
Saudi Arabia
,
Asia and Pacific

In 2017, Raidah Investment Company (RIC) was mandated to become the investment arm of the Public Pension Agency (PPA) of Saudi Arabia. The RIC’s mission was to maximize investment returns while maintaining a prudent risk in order to meet PPA’s funding obligations.

Topic:
Governance and administration
Investment
Implementation year:
2016
Award Year:
2020
Savings-Pensions Branch of the Deposit and Management Fund
,
Morocco
,
Africa

In accordance with good practices concerning the governance and investment of social security funds, Morocco’s Deposit and Management Fund Insurance (Caisse de Dépôt et de Gestion PrévoyanceCDG Prévoyance), hereafter referred to as CDG Insurance, tasked with managing social security funds, makes systematic use of an annual external audit of its financial management conducted by a specialized external audit firm.

Topic:
Governance and administration
Investment
Implementation year:
2016
Award Year:
2023
Employment and Social Development Canada
,
Canada
,
Americas

The Canada Pension Plan Service Improvement Strategy (CPP SIS), developed by the Employment and Social Development Canada (ESDC), was successfully concluded in 2022. The six-year strategy was designed to address service delivery challenges brought on by the increasing number of clients and evolving client expectations of government services.

Topic:
Disability
Investment
Service quality
Implementation year:
2016
Award Year:
2023
National Commission of the Retirement Savings System
,
Mexico
,
Americas

Mexico’s National Commission of the Retirement Savings System (Comisión Nacional del Sistema de Ahorro para el Retiro – CONSAR) runs a professionalization training programme for the investment and risk management teams of Retirement Fund Administrators (Administradoras de Fondos para el Retiro – AFOREs). In this system, AFOREs’ staff members receive certifications from a recognized and prestigious independent third party that delivers training in financial matters.

Topic:
Old-age pensions
Investment
Implementation year:
2016
Award Year:
2023
Pension and Retirement Board of the National Teachers' Union
,
Costa Rica
,
Americas

Since 2016, Costa Rica’s Pension and Retirement Board of the National Teachers’ Union (Junta de Pensiones y Jubilaciones del Magisterio Nacional – JUPEMA) has established a self‑balancing formula for its defined-benefit Collective Capitalization System (Régimen de Capitalización Colectiva – RCC), which facilitates the setting of investment targets related to fund solvency, as well as the Board of Directors’ decision-making.

Topic:
Actuarial
Implementation year:
2016
Award Year:
2017
National Social Security Administration
,
Argentina
,
Americas

This is about a platform for data exploration and analysis which aims to allow large quantities of data to be visualized, filtered and categorized so as to inform organizational decisions affecting society at large.

Topic:
Governance and administration
Information and communication technology
Actuarial
Implementation year:
2016
Award Year:
2023
Social Security Fund
,
Libya
,
Africa

The Social Security Fund (SSF) of Libya is seeking to ensure its investments and assets, creating psychological and social stability for its employees from operational risks, and transferring these risks to insurance companies to address them accordingly.

Topic:
Investment
Shocks & extreme events
Implementation year:
2015
Award Year:
2021
Fiji National Provident Fund
,
Fiji
,
Asia and Pacific

The pension reforms carried out by the Fiji National Provident Fund (FNPF or the Fund) in 2011 ushered in a new legislation that changed the dynamics of the Fund. The new law was introduced to address the increasing pension burden, which was flagged as a financial and solvency risk and, given the Fund’s position in the financial sector, an imminent systemic risk.

Topic:
Actuarial
Governance and administration
Implementation year:
2015
Award Year:
2021
Ministry of Human Resources and Social Security
,
China
,
Asia and Pacific

China, as the most populous country in the world, is facing the great pressure of demographic change and the sustainability of old-age insurance system.

In recent years, the Chinese government has taken various measures to promote the market-oriented investment and operation of the basic old-age insurance fund (hereinafter referred to as the fund). The investment scale has increased year by year, and its income has steadily increased, providing support for the sustainable development of the old-age insurance system.

Topic:
Investment
Implementation year:
2015
Award Year:
2015
Mexican Social Security Institute
,
Mexico
,
Americas

In the face of the problem posed by the financial deficit of the Sickness and Maternity Insurance in terms of its coverage for affiliates and pensioners, we had to look for methodologies to assess the future trends of revenues and expenses.

To estimate the coverage expense for Medical Expenses for Pensioners (gastos médicos de pensionados (GMP)), in 2013 we developed an actuarial model with which we could estimate the sufficient leveled premium to settle the future expenses based on the results obtained.

Topic:
Health
Actuarial
Implementation year:
2015
Award Year:
2015
Mexican Social Security Institute
,
Mexico
,
Americas

On the grounds of the amendment of the Mexican Social Security Law of 1995, we discerned the need to implement a new actuarial model to valuate the financial situation of the Disability and Life Insurance (seguro de invalidez y vida (SIV)), according to the radical change in the pension scheme. Therefrom, we adjusted the existing actuarial models; however, eventually, the need and challenge of reconsidering the model arose in order to have a model that covered the changes taking place during the terms of the pension scheme.

Topic:
Disability
Actuarial
Implementation year:
2014
Award Year:
2016
Social Insurance Institution
,
Poland
,
Europe

The Polish Social Insurance Institution (ZUS) is by law obliged to prepare forecasts of the spending and revenues of the Social Insurance Fund (FUS) (i.e. the pension fund, the disability fund, the sickness fund and the work injury fund). A cohort model built to fulfil this requirement was sufficient to forecast aggregate spending and revenues, but, being based on average cohort values, it does not provide information on the benefits’ structure.

Topic:
Actuarial
Implementation year:
2014
Award Year:
2023
National Commission of the Retirement Savings System
,
Mexico
,
Americas

Mexico’s National Commission of the Retirement Savings System (Comisión Nacional del Sistema de Ahorro para el Retiro – CONSAR) is committed to providing Mexican workers with guidance and education on financial and social security matters, specifically in relation to saving for old age. The “CONSAR Collection of Retirement Savings Calculators” (hereinafter Calculators) groups together tools designed for people who will retire under defined-contribution pension systems with individual accounts.

Topic:
Old-age pensions
Actuarial
Information and communication technology
Communication
Implementation year:
2014
Award Year:
2023
Pension and Retirement Board of the National Teachers' Union
,
Costa Rica
,
Americas

Since 2014, the actuarial department of Costa Rica’s Pension and Retirement Board of the National Teachers’ Union (Junta de Pensiones y Jubilaciones del Magisterio Nacional – JUPEMA) in Costa Rica has produced a report known as the “Blue Report” (Informe Azul) for members of its defined-benefit Collective Capitalization System (Régimen de Capitalización Colectiva – RCC). The report aims to give members an overview of the actuarial situation in accessible language.

Topic:
Actuarial
Implementation year:
2014
Award Year:
2023
Social Security Fund
,
Libya
,
Africa

Through this participation, we aim to clarify the idea of establishing the Libyan Centre for Research and Actuarial Studies, and the procedures that the administration followed in refining and qualifying human cadres in the fields of social protection, social research, and actuarial studies.

Topic:
Actuarial
Implementation year:
2014
Award Year:
2015
Social Protection Fund
,
Oman
,
Asia and Pacific

In order to achieve good corporate governance, the Risk Management Department developed an excel model for Risk Rating and Grading of the PASI investment portfolio for more effective risk management:
 

1. Design Risk Measurement Models:

Data is collected from PASI investments on a monthly basis to calculate the Yearly Volatility and Return.
 

2. Capital Asset Pricing Model (CAPM)

Calculation of Beta, Expected Return and Drift Rate.
 

Topic:
Service quality
Governance and administration
Investment
Implementation year:
2014
Award Year:
2023
Social Security Fund
,
Libya
,
Africa

Training is a key element for any organization striving to prepare cadres capable of meeting business needs and keeping abreast of the rapid developments and changes in the field of work. It is also considered one of the various means of investment that benefits the Social Security Fund (SSF, hereafter the Fund) of Libya.

Topic:
Employment
Human resource management
Investment
Service quality
Implementation year:
2013
Award Year:
2022
Social Insurance Institution
,
Poland
,
Europe

Due to the wide scope of its statutory activities, the Social Insurance Institution (Zaklad Ubezpieczen Spolecznych − ZUS) has huge information resources and conducts numerous statistical surveys that allow for cross-sectional analysis of phenomena in the field of social insurance. The results of ZUS studies, analyses, forecasts and widely available statistical information are used by many public institutions, research institutions and private recipients.

Topic:
Actuarial
Information and communication technology
Communication
Implementation year:
2011
Award Year:
2014
Pension Fund of Morocco
,
Morocco
,
Africa

The Pension Fund of Morocco (Caisse marocaine des retraites (CMR)) ensures the financial equilibrium of the pension schemes it manages by preparing actuarial balance sheets that are presented annually to its Board of Directors. The balance sheet results help decision-makers assess the scheme's financial sustainability and take decisions on steering the system or adjusting the parameters.

Topic:
Actuarial
Implementation year:
2010
Award Year:
2010
Office of the Chief Actuary - Office of the Superintendent of Financial Institutions
,
Canada
,
Americas
The Office of the Chief Actuary commissions an external peer-review process for each triennial actuarial report of the Canada Pension Plan (CPP). The Board (federal and provincial finance ministers) endorses the peer-review process. 
 
The three peer-reviewers must be actuaries enrolled with the Canadian Institute of Actuaries.
Topic:
Governance and administration
Actuarial
Implementation year:
2010
Award Year:
2010
Office of the Chief Actuary - Office of the Superintendent of Financial Institutions
,
Canada
,
Americas
By legislation, every three years, the federal and provincial ministers of finance shall review the state of the Canada Pension Plan (CPP) and may make recommendations as to whether benefits or contributions rates or both should be changed.
 
The factors to be considered are:
  • the most recent statutory actuarial report prepared by the Chief Actuary tabled in Parliament;
  • any more recent estimates of the Chief Actuary;
  • to maintain a relatively stable ratio of assets to expenditures over a long time horizon by determining a rel
Topic:
Old-age pensions
Actuarial
Implementation year:
2010
Award Year:
2010
Office of the Chief Actuary - Office of the Superintendent of Financial Institutions
,
Canada
,
Americas

If the latest actuarial report indicates a minimum contribution rate that is higher than the current legislated contribution rate and the federal and provincial finance ministers, after their financial review, do not make a recommendation, then Canada Pension Plan (CPP) selfsustaining default provisions apply.

Default provisions: If the legislated contribution rate is lower than the minimum contribution rate and if finance ministers do not make a recommendation, then default provisions apply:

Topic:
Actuarial
Implementation year:
2010
Award Year:
2010
Office of the Chief Actuary - Office of the Superintendent of Financial Institutions
,
Canada
,
Americas
The actuarial examination of the Canada Pension Plan (CPP) involves projections of its revenues and expenditures over a long period of time, so that the future impact of historical and projected trends in demographic and economic factors can be properly assessed.
 
The steady-state contribution rate is defined in the regulations as the lowest level of contribution rate applicable after the end of the three-year review period that results in the assets/expenditure ratio being the same in the 10th and 60th year following the end of the review period.
Topic:
Actuarial
Implementation year:
2009
Award Year:
2023
National Social Insurance Fund
,
Cameroon
,
Africa

The long and difficult economic crisis which Cameroon went through between the mid-1980s and the early 2000s left its mark on the social security system managed by the National Social Insurance Fund (Caisse nationale de prévoyance sociale – CNPS), plunging the country into a structural deficit that lasted until 2016.

Topic:
Investment
Implementation year:
2007
Award Year:
2014
Supervisory Authority of Insurance and Social Welfare
,
Morocco
,
Africa

The Directorate of Workers 19 Social Protection (Direction de la Protection Sociale des Travailleurs (DAPS)) developed the ATLAS software as part of the reflection on and reform of pension schemes in Morocco. It is designed to respond to the specificities of Moroccan pension schemes. It can be used to develop projections that will assist in piloting these schemes by producing:

Topic:
Actuarial
Implementation year:
2007
Award Year:
2008
Pension Fund of Morocco
,
Morocco
,
Africa

The scoreboard is a management tool designed to assist decision-making. It groups performance indicators concerning the financial and demographic status of a pension scheme as well as equity and intra- and inter-generational solidarity, in the form of a structured and synthetic report. It enables decision-makers to keep track of the evolution of the system they are managing, to detect possible threats and take the necessary decisions at the appropriate time.

Topic:
Governance and administration
Actuarial
Implementation year:
2004
Award Year:
2023
Mutual Benefit Society for Public Employees
,
Burundi
,
Africa

The progressive establishment of Mutual Benefit Society for Public Employees (Mutuelle de la fonction publique – MFP) agencies in Burundi’s provinces encourages a gradual decentralization of services – notably registration, benefit checks and contribution collection – and also promotes the extension of health-care coverage throughout the country.

Topic:
Employment
Governance and administration
Extension of coverage
Communication
Contribution collection and compliance
Investment
Service quality
Implementation year:
2003
Award Year:
2023
Interprofessional Retirement Fund
,
Morocco
,
Africa

Since reforms of its scheme were implemented in 2003, the Interprofessional Retirement Fund (Caisse interprofessionnelle marocaine de retraite – CIMR) of Morocco has created its steering committee, composed of managers and senior members of the institution, which is aimed mainly at proposing to the Administrative Council all necessary measures to maintain the sustainability of the Fund over the long term, on the basis of updated financial and actuarial projections.

Topic:
Old-age pensions
Actuarial
Implementation year:
2002
Award Year:
2023
Savings-Pensions Branch of the Deposit and Management Fund
,
Morocco
,
Africa

CDG Prévoyance, a branch of Morocco’s Deposit and Management Fund (Caisse de dépôt et de gestion – CDG), is responsible for managing two institutions: the National Pension and Insurance Fund (Caisse nationale de retraites et d’assurances – CNRA) and the Collective Pension Scheme (Régime collectif d’allocation de retraite – RCAR). Its primary mission is to ensure the management of pension schemes and solidarity funds, while contributing to the country’s economic, social and human development.

Topic:
Actuarial
Implementation year:
2002
Award Year:
2023
Savings-Pensions Branch of the Deposit and Management Fund
,
Morocco
,
Africa

As part of its social mission, Morocco’s CDG Prévoyance manages, by way of the National Pension and Insurance Fund (Caisse nationale de retraite et d’assurances – CNRA), a public institution guaranteed by the State, a multitude of schemes and solidarity funds covering various categories of beneficiary. As such, the CNRA is responsible for collecting the constituent capital, which is calculated according to rates imposed by legislation.

Topic:
Actuarial
Implementation year:
2000
Award Year:
2016
Swedish Pensions Agency
,
Sweden
,
Europe

The Orange Report - The Annual Report of the Swedish Pension System - is a means of spreading and presenting information and knowledge about how the Swedish public pension system works and performs.

The Orange Report combines common accounting principles and a specially developed method to be able to present the financial development of a public (and essentially pay-as-you-go financed) pension scheme.

The target groups for this system level information are: government, politicians, policy analysts, media and researchers.

Topic:
Old-age pensions
Governance and administration
Communication
Actuarial
Implementation year:
1999
Award Year:
2015
Office of the Chief Actuary - Office of the Superintendent of Financial Institutions
,
Canada
,
Americas

The Office of the Chief Actuary (OCA) is required by legislation to produce regular actuarial reports assessing the sustainability of the Canada Pension Plan (CPP). The Chief Actuary is solely responsible for the content of the report and for the assumptions used.

The OCA follows a well-documented and clear assumptions development process.

Topic:
Governance and administration
Actuarial
Implementation year:
1997
Award Year:
2016
Pension Fund of the Russian Federation
,
Russian Federation
,
Europe

The valuation of the balance between the acquired pension entitlements and liabilities of the mandatory pension insurance system is conducted on the basis of the Pension Fund’s (PFR) actuarial model, developed and verified by a specialized department of the PFR - the Department for Actuarial Valuations and Strategic Planning. This model is a unique product and enabler to accumulate every specific option of pension entitlement valuation under the national pension legislation.

Topic:
Actuarial
Implementation year:
1992
Award Year:
2023
Federal Social Insurance Council
,
Argentina
,
Americas

The city of Neuquén’s Municipal Social Insurance Institute (Instituto Municipal de Previsión Social – IMPS), part of Argentina’s Federal Social Insurance Council (Consejo Federal de Previsión Social – COFEPRES), was founded on 28 August 1958. It was established with a view to speeding up the process by which benefits were granted to the city’s municipal employees, since at that time these procedures were referred to the city of Buenos Aires by virtue of National Law No. 4349.

Topic:
Investment
Implementation year:
1987
Award Year:
2023
Mutual Benefit Society for Public Employees
,
Burundi
,
Africa

The progressive opening of Mutual Benefit Society for Public Employees (Mutuelle de la fonction publique – MFP) counters in Burundi’s public and accredited hospitals helps to combat fraud, social security evasion and identification, and prescribing errors while promoting the gradual extension of health-care coverage throughout the country. This results in job creation, as benefit controllers are recruited to work in the hospitals in question. There are also significant advantages for the MFP, as vast amounts of money are returned to the fund and fraud and error are prevented.

Topic:
Employment
Governance and administration
Extension of coverage
Investment
Service quality
Error, evasion and fraud
Continuity and resilience
Implementation year:
1981
Award Year:
2020
Social Security Fund
,
Libya
,
Africa

After incorporating all social insurance systems represented in the civil service retirement, military service retirement, and the free social pension systems under one title and organization, namely, The General Committee of Social Security, and after the return of all the assets and properties of these systems to the mentioned commission, all of which has emphasized the financial status of the commission to result in owning strong financial assets and returns. As a result, the serious need to find various investment channels arose.

Topic:
Investment
Implementation year:
2018
Award Year:
2021
Abu Dhabi Pension Fund
,
United Arab Emirates
,
Asia and Pacific

The mission statement of the Abu Dhabi Pension Fund (ADPF) of the United Arab Emirates highlights a key priority to maintain financial sustainability in the provision of future benefits. To achieve that, the Fund regularly monitors its liability and identify different factors affecting it.

One factor identified to negatively impact liabilities was changes to pensionable salaries done by employers. The fund operates a Final Salary Defined Benefit (DB) system, which by definition can be vulnerable to such changes.

Topic:
Actuarial
Implementation year:
2018
Award Year:
2021
Social Protection Fund
,
Oman
,
Asia and Pacific

The purpose of the project is to ensure the risk and return of the investment portfolio of the Public Authority for Social Insurance (PASI) of Oman meets its target to maintain the sustainability of the scheme in order to provide the required benefits to pensioners.

The PASI risk scoring methodology is as follows:

Topic:
Investment
Implementation year:
2018
Award Year:
2021
General Organization for Social Insurance
,
Saudi Arabia
,
Asia and Pacific

Masdr Data Solution Company is a company owned by the General Organization of Social Insurance (GOSI) of Saudi Arabia. It was established in 2018 with the goal to utilize the labour market data and enhance the social and economic welfare. GOSI views Masdr as an opportunity to better serve society and contribute to the digital transformation inspired by the 2030 Vision. The establishment of Masdr has increased GOSI’s customer satisfaction as it shortened and eased the service delivery journey.

Topic:
Governance and administration
Information and communication technology
Investment
Service quality
Implementation year:
2017
Award Year:
2023
Social Security Fund
,
Libya
,
Africa

In early 2012, the Libyan Centre for Consultancies and Human Development (LCCHD, hereafter the Centre) was assigned to carry out the task of conducting the annual Training Needs Assessment (TNA) and delivering quality training for all Social Security Fund (SSF) employees across Libya.

Topic:
Employment
Human resource management
Investment
Service quality
Implementation year:
2017
Award Year:
2021
Civil Service Employees Pension Fund
,
Oman
,
Asia and Pacific

The Civil Service Employees Pension Fund (CSEPF) is a service organization providing social protection to Omani citizens working in the public sector in Oman, the Gulf Cooperation Countries and elsewhere.

CSEPF established its Risk Department, which led to:

Topic:
Governance and administration
Investment
Implementation year:
2017
Award Year:
2017
Derrama Magisterial
,
Peru
,
Americas

The Derrama Magisterial (DM) has begun offering a number of services in accordance with the terms of its Statutes, and one noteworthy scheme involves providing credit to member teachers at a preferential rate of interest. Such credit, along with other types of investment, helps support the organization, and contributes above all to providing pension-related benefits to member teachers and their dependents. 

Topic:
Service quality
Actuarial
Implementation year:
2017
Award Year:
2021
General Organization for Social Insurance
,
Saudi Arabia
,
Asia and Pacific

In 2017, Raidah Investment Company (RIC) was mandated to become the investment arm of the Public Pension Agency (PPA) of Saudi Arabia. The RIC’s mission was to maximize investment returns while maintaining a prudent risk in order to meet PPA’s funding obligations.

Topic:
Governance and administration
Investment
Implementation year:
2016
Award Year:
2020
Savings-Pensions Branch of the Deposit and Management Fund
,
Morocco
,
Africa

In accordance with good practices concerning the governance and investment of social security funds, Morocco’s Deposit and Management Fund Insurance (Caisse de Dépôt et de Gestion PrévoyanceCDG Prévoyance), hereafter referred to as CDG Insurance, tasked with managing social security funds, makes systematic use of an annual external audit of its financial management conducted by a specialized external audit firm.

Topic:
Governance and administration
Investment
Implementation year:
2016
Award Year:
2023
Employment and Social Development Canada
,
Canada
,
Americas

The Canada Pension Plan Service Improvement Strategy (CPP SIS), developed by the Employment and Social Development Canada (ESDC), was successfully concluded in 2022. The six-year strategy was designed to address service delivery challenges brought on by the increasing number of clients and evolving client expectations of government services.

Topic:
Disability
Investment
Service quality
Implementation year:
2016
Award Year:
2023
National Commission of the Retirement Savings System
,
Mexico
,
Americas

Mexico’s National Commission of the Retirement Savings System (Comisión Nacional del Sistema de Ahorro para el Retiro – CONSAR) runs a professionalization training programme for the investment and risk management teams of Retirement Fund Administrators (Administradoras de Fondos para el Retiro – AFOREs). In this system, AFOREs’ staff members receive certifications from a recognized and prestigious independent third party that delivers training in financial matters.

Topic:
Old-age pensions
Investment