In 1978, ADB established a Postevaluation Office reporting directly to the President to assess whether the actual benefits of completed projects matched those expected at appraisal.
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The need for greater accountability and learning broadened the scope of evaluations and subsequently led to the formation of the Operations Evaluation Office in 1999. The office became a department in 2001. |

In January 2004, an important organizational change established the independence of the Operations Evaluation Department. OED began to report directly to the Board of Directors through the Board's Development Effectiveness Committee. |
Since then, the function of operations evaluation has changed from recording history to shaping decision making throughout the project cycle, and in ADB as a whole. |
Today, OED's core task is the systematic and objective assessment of policies, strategies, country and sector programs, and projects, including their design, implementation, results, and associated business processes. |

OED conducts evaluations to find out what results are being achieved, what improvements should be considered, and what lessons can be learned. |
Producing credible, timely, and objective data, information, and knowledge on ADB's performance promotes development impact if it informs decision making. |
All the while, through the evaluation process, ADB demonstrates three elements of good governance: accountability, transparency, and improved performance. |
Evaluations that focus on key issues and provide actionable and timely recommendations are a cost effective means to improve performance. |

Recent influential evaluations have stemmed from work to improve country partnership strategies and sector assistance programs, promote portfolio performance, build a results-based management framework, and contribute to safeguard policy updates. |
Directions in evaluation include harmonizing evaluation standards, evaluating country and sector assistance programs, validating completion reports, evaluating impact, developing evaluation capacity, evaluating business processes, and continuing promotion of portfolio performance. |
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