According to the time the assessment is conducted in the project cycle The different types of evaluation vary according to when they take place. The types of evaluation are: ex-ante, process, ex-post and impact. Ex-ante: this is provided prior to approval of the project and seeks to understand its relevance , feasibility and potential effectiveness. This type of evaluation is to select from several technically feasible alternatives to the one that produces the greatest impact at minimum cost. This type of evaluation involves the incorporation of necessary adjustments in project design, which could generate even change the target group, its hierarchy of objectives and budget. Evaluation of process, operational, medium term or continuous: It is done as the project unfolds and is closely related to monitoring the project.Lets know how much has been achieved in achieving the objectives (results in case of logical framework), in relation to this, an evaluation of this type should seek to contribute to the improvement of employee intervention model and identify lessons learned. The funding sources often require the development of this type of evaluation to perform periodic disbursements. Ex-post, or end results of the project: It is performed when the project ends. It focuses on investigating the level of achievement of the objectives (Purpose and Results in case of logical framework) also seeks to demonstrate that changes are the result of project activities (alone or in interaction with other sources) often used for this an experimental design. Not only ascertained by positive changes, it also analyzes adverse effects and unexpected.Impact assessment: Is it permament explores the changes and improvements in the quality of life produced by the project, ie focuses on knowing the sustainability of changes achieved and unintended effects (positive or negative). If logical framework design, focuses on the evaluation of the End of the hierarchy of objectives.This assessment must necessarily be done after a time of completion of the project and not complete it immediately, the recommended time to make the impact assessment is 5 years. can be seen that the ex-ante and process are considered because of formative assessments that occur while there is the preparation and / or execution of the project and its findings are used to optimize the execution whereas outcome evaluations and impact are to be summative assessments that occur to complete the project and even some time after the completion, the case that their findings will be transferred to other experiences but may not have direct application in the project which is now closed. The evaluations of results and impacts require assume a specific research design, as discussed below.