Analysis and operationalization of the problem of sheltering and containment in Belgium. Research commissioned by the Federal Crisis Centre. On the one hand, we carried out an online consultation of the Delphi type (MESYDEL proprietary software) with persons concerned by the intervention and under the responsibility of federal, regional, provincial and local authorities for the various disciplines concerned by crisis management, and on the other hand, we organised several focus groups and a validation conference. Writing of evaluation reports and a vade mecum.