DataWarehouses (DWs) are conceived according to data sources and users requirements. Therefore, the more the DW model reflects stakeholders'needs, the more the stakeholders will make use of their data. Therefore, in literature particular attention has been provided to DWrequirement elicitation, specification and validation processes. However, most of these approaches are based on the interviews and complex formalisms that cannot be used with unskilled OLAP decision-makers. Therefore, we propose a new elicitation methodology based on the pivot table formalism, since it is well-known and used by decisionmakers. We validate our methodology using a real case study.