IEO conducts accountability and learning-focused evaluations that generate lessons learned for the GEF. The evaluations focus on results, impact and performance of the GEF, and address strategic issues of the partnership.
Overall Performance Studies (OPS) are performed every four years to provide solid evaluative evidence to donors. These evaluations provide an independent assessment of performance and results of the GEF over a GEF replenishment period. The comprehensive evaluations assess the extent to which the GEF is achieving its objectives and identify potential areas of improvement.
Evaluation of Incremental Cost Assessment 2007
Incremental cost is the fundamental operational principle of the GEF. The GEF funds the increment, or additional costs associated with transforming a project with national/local benefits into one with global environmental benefits. The principle of incremental cost was originally envisaged to ensure that GEF funds do not substitute for existing development finance but provide new and additional funding to produce agreed global environmental benefits.

Experience of Executing Agencies under Expanded Opportunities in the GEF
In 1999, the Global Environment Facility (GEF) Council approved expanded opportunities to undertake GEF projects for seven Executing Agencies (ExAs): the Asian Development Bank, African Development Bank, European Bank for Reconstruction and Development, Food and Agriculture Organization of the United Nations, Inter-American Development Bank, International Fund for Agricultural Development, and United Nations Industrial Development Organization. However, their involvement in the GEF did not grow as expected.

Joint Evaluation of the GEF Activity Cycle and Modalities
In June 2005, the GEF Council welcomed the proposed evaluation to assess the efficiency of the GEF activity cycle and modalities, and underscored that efforts to improve the cycle had so far not succeeded: “the project cycle elapsed times are still too long.” The evaluation was approved as a special initiative of the GEF Evaluation Office: to analyze the strengths and weaknesses in the GEF Activity Cycle and related delivery modalities, and uncover the underlying causes of inefficiencies.

Annual Performance Report (APR) 2005
The GEF Second Annual Performance Report (APR) 2005, presented and prepared by the GEF Evaluation Office, focuses on completed projects for which terminal evaluations were submitted during fiscal year 2005. The full report provides an assessment of project outcomes, project sustainability, project completion delays, and the quality of monitoring in completed projects.

GEF Support to Biosafety 2006
At its November 2004 meeting the GEF Council requested the GEF Evaluation Office to initiate an evaluation of the biosafety activities financed under the GEF’s Initial Strategy. This report presents the results of this evaluation.
The evaluation contains many valuable findings that will allow the GEF to improve and adapt its support. For example, it was found that countries that already had considerable experience with biosafety issues were better able to utilize the support.

Role of Local Benefits in Global Environmental Programs 2006
This study analyzes the relationship between local benefits and global environment benefits in the GEF covering 132 GEF projects, including 18 field case studies. The study concentrated only on those GEF projects that had stated objectives to generate local benefits as an essential mechanism in achieving their intended global benefits. The study focused on the role of benefits at the local level: that is, the geographical area directly affected by the intervention.

Biodiversity Indicators for Monitoring Program Implementation and Impact
This report on “Biodiversity Indicators for Monitoring GEF Programme Implementation and Impacts” was prepared for the Global Environment Facility (GEF) by staff of the World Conservation Monitoring Centre (WCMC). The work was commissioned by the GEF Monitoring and Evaluation Team.

GEF Monitoring and Evaluation (M&E) Policy 2006
The GEF Council approved the revised M&E Policy in November 2006.
UNEP-GEF Toolkit Evaluation
The aim of this evaluation is twofold. Firstly, to assess the degree to which the UNEP-GEF Toolkits, used for the development of National Biosafety Frameworks (NBFs) are consistent with the Cartagena Protocol, responsive to country needs, and of sufficient professional quality. Secondly, to get a good overview of what the general issues/difficulties are that respondents encountered during the process of setting up a
National Biosafety Framework.

Annual Performance Report (APR) 2002 (Project Performance Report)
The Project Performance Report (PPR) has three objectives; to assist decision-making on improvements to policies, strategies , program management, procedures and projects, to promote accountability for resource use, and to document and feedback on results and lessons learned. The PPR draws on the findings of the 2002 Project Implementation Review (PIR), a monitoring process based upon reporting by the GEF Implementing Agencies (IAs) on all projects being implemented for at least one year as of June 2002. The report also compiles findings, lessons, and recommendations drawn from the Secretariat Managed Project Reviews, and Terminal Evaluation Reviews. This Review looks at 272 ongoing projects.
