This article is focused on the implementation of the Work Sampling technique at the Science and Technology Corporation for the development of the Naval, Maritime and Riverine Industry – COTECMAR, more specifically in the Production Department of the Maintenance and Ship Repair Management located in Mamonal facilities; in order to know the percentage of idle times in performed productive processes and to identify the main triggers, through the estimation of the proportion of time played in specifics activities in a certain period of time, using instantaneous observations of work areas and employing probability sampling to generalize the findings.