Developing effective national monitoring and evaluation (M&E) systems and/or performance budgeting initiatives requires well-defined formulation and implementation strategies for setting up performance indicators. These strategies vary depending on a country's priority for measuring results and on the scope and pace of its performance management reform objectives. Some countries have followed an incremental method for developing indicators, that is, progressively, at strategically selected programs/sectors (for example, Canada, the United Kingdom, and Colombia), while others have taken a comprehensive, 'big bang' approach by defining indicators for all existing programs and sectors at once (for example, Mexico and the Republic of Korea). In both cases, countries need to continuously work on their indicators to improve their quality and thus ensure that indicators can meaningfully inform government processes.