The new Istat Directorate for Data Collection, from its constitution in April 2016 to now, is focusing on some strategic projects, aimed at harmonizing and making more efficient the data collection operations for all the surveys conducted by the Institute. Among these projects, there is the integrated management system, already being implemented for the 2018 Permanent Population and Housing Census. The IT development of the system requires a reflection, in particular from a theoretical point of view, in order to identify and implement all the functionalities necessary for the management of each survey, within a single conceptual framework. A fundamental aspect of the design of this integrated management system is certainly the definition of the status and of the final disposition codes for the survey units. Accompanied by an appropriate set of rules of assignment, they are the basis of some important functions connected to the implementation of the activities of implementation, monitoring and control of the survey. To overcome the difficulties related to the peculiarities of the single surveys, characterized by different sampling designs and survey modes, we proceeded to make an in-depth comparison between the systems of the outcomes currently used, which led to: • reduce redundancies; • respect the peculiarities without loss of information; • harmonize the final disposition codes of the survey units at a higher level of synthesis. The status and the outcomes of the survey units thus allow to monitor the phases of their initial assignment, of implementation of the field work and of final validation. Furthermore, the final outcomes (after validation) allow the calculation of indicators on survey quality (mainly coverage and non-response rates), in compliance with national (SIDI) and international (AAPOR) standards.