Ruil (Nothofagus alessandrii) is a Chilean endemic tree species distributed in the central part of the country. Intensive past deforestation and current threats have severely impacted the species population, placing it in an endangered conservation status. As a response, a Species Recovery Plan (SRP) is being developed, which, through 15 strategies, proposes to minimise the existent threats and foster ruil population enhancement. As part of the SRP, Monitoring and Evaluation (M&E) design is required in order to analyse SRP effectiveness, which will allow to identify what is working and what should be modified. For that, the Open Standards for the Practice of Conservation was used, framework based on the adaptive management spirit. Following this framework, a Situation Analysis (SA), Results Chains (RC) and M&E proposal were developed. 57 variables were created for SA, while 71 in RC. From the latter, 33 variables were chosen as key results to be monitored, from which outcomes and indicators were proposed. According to the effectiveness evaluation, five key questions were carried out which provide different perspectives of SRP performance: (a) Is the ruil conservation status improving?; (b) Is there a causal effect between SRP strategies and ruil improvements?; (c) Are ruil threats decreasing?; (d) Are the strategies generating changes over time?; and (e) What conservation measures are working better? The M&E proposal encompasses three types of methodologies: first, Ambient Monitoring to analyse ruil conservation status; second, Impact Evaluation, to establish a causal relationship between ruil improvement and SRP; and third, Performance Measurements. They were designed to provide a quicker and lower-cost assessment for managing SRP opportunely. Finally, the results highlight Pro and cons related to reliability, affordability and timeliness of the M&E designed are discussed, as well as the opportunities that the incorporation of a M&E process can provide to ruil SRP and, in general, to Chilean policy related to endangered species.PFCHA-BecasPFCHA-Becas