26. 秘书长在报告(A/76/330)中指出，联合国难民事务高级专员公署(难民署)和国际移民组织(移民组织)都重申了他们迁入联合国内罗毕办事处大院的承诺和打算，在吉吉里大院为难民署和(或)移民组织增建新楼不会对 A 至 J 号办公区建设项目的费用或时间表产生不利影响。这一举措可能会带来潜在的规模经济或增效，但现阶段尚无法确定(A/76/330，第 53-54 段)。行预咨委会询问后获悉，如果难民署和移民组织承诺为增建的建筑提供全额资金，规模经济或增效将得到确认；鉴于新建筑的牵头咨询(建筑)服务合同允许在资金确认后作为合同组成部分增加移民组织/难民署建筑的额外设计，潜在的规模经济将是新建筑的设计。A 至 J 号区建筑项目在设计上的任何节省都将在设计过程结束时因规模经济而实现。行预咨委会获悉，建筑合同还将产生其他规模经济，因为包括移民组织/难民署出资的建筑的合同可能会使建筑项目的单价较低，原因是由此消除了建筑公司在调动资源等方面的重复费用。
26. The Secretary-General, in his report (A/76/330), indicates that both the Office of the United Nations High Commissioner for Refugees (UNHCR) and the International Organization for Migration (IOM) have reaffirmed their commitment and intention to move into the United Nations Office at Nairobi compound and that adding any new, additional buildings for UNHCR and/or IOM to the Gigiri complex will not have any adverse impact on the cost or schedule of the construction project on office blocks A–J. The move may result in a potential economy of scale or efficiency gains, which cannot be determined at this stage (A/76/330, paras. 53–54). Upon enquiry, the Advisory Committee was informed that an economy of scale or efficiency gains would be confirmed should UNHCR and IOM commit themselves to fully financing the additional buildings and that a potential economy of scale would be the design of the new building, given that the contract for lead consultancy (architectural) services for the new building allows for the additional design of an IOM/UNHCR building to be added as a contractual component once funding is confirmed. Any savings in the design for the A–J construction project would be triggered by economies of scale at the end of the design process. The Committee was informed that other economies of scale would result from the construction contract because a contract that includes an IOM/UNHCR-funded building might lead to a lower unit price for construction items, given the attendant elimination of duplicated costs, such as mobilization for the construction firm.