Amid increasing threats from natural disasters, the demand for relief supplies is growing quickly. As such, private-sector collaborations have been an efficient way for relief organisations to mitigate the burden of supply procurement and inventory. However, due to the complexity of disasters, such collaboration contracts are not one-size-fits-all. Based on our field investigation and literature review, we summarize two important factors, the relief organisation’s objective and inventory management, which should determine the design of the contract. Each factor has three important elements, so we can build a framework for the corresponding nine kinds of contracts and propose their models. Through a common numerical experiment, we make comparisons and further clarify their characteristics. The results of this analysis may be helpful in determining which kind of contract is most suitable to promote collaboration between relief organisations and private-sector entities in different humanitarian situations.

随着自然灾害的威胁日益增加，对救援物资的需求迅速增长。因此，私营部门合作一直是救援组织减轻物资采购和库存负担的有效方式。然而，由于灾难的复杂性，这种协作合同并不是一刀切的。根据我们的实地调查和文献综述，我们总结了两个重要因素，即救援组织的目标和库存管理，这两个因素应决定合同的设计。每个因素都有三个重要的要素，因此我们可以为相应的九种合约构建框架并提出它们的模型。通过共同的数值实验，我们进行比较，进一步明确它们的特点。这一分析的结果可能有助于确定哪种合同最适合促进不同人道主义局势下救援组织和私营部门实体之间的合作。