Software requirements are key elements that contribute to the quality of systems and stakeholders' satisfaction. In the domain of public transport, many information systems have been developed; however, the majority is focused on operational planning and public transport control, discarding the strategic-tactical levels of action. While at operational level management, the control is usually centered on public transport providers, at the strategic and tactical levels, a close interaction from distinct types of stakeholders is required. Moreover, management is distinct among cities. This work aims to define the conceptualization of a configurable decision support system (DSS) for the tactical-strategic management of public transport. The various needs and perspectives of the stakeholders are taken into account, and the data used as a basis have high granularity.