Consider a lessor (service provider) offering a multi-period lease contract (LC) for remanufactured products. The LC proposed has two attributes –i.e. $m$periods, $\left(m⩾1\right)$ and a usage threshold (a limitation of usage allowed). If the total usage of the product is below the usage threshold during the LC periods, then no extra charge is required. Otherwise the lessee needs to pay some extra charge. The lessor is responsible to carry out maintenance actions during the LC periods, and promises a high availability (or a low downtime). If the downtime is above the target then there will be a penalty cost to the lessor. The LC price for the remanufactured product is much cheaper, and hence it becomes attractive and needs to be considered when the lessee is looking for a better option of a LC. For the multi-period LC studied, the lessor will decide the maintenance policy and the price for the LC offered, whilst the lessee will find the rate of its usage and the LC periods suitable to its business. The numerical examples are presented to illustrate the optimal decision variables for each party.

考虑出租人（服务提供商）为再制造产品提供多期租赁合同（LC）。建议的信用证具有两个属性-即$米$期间， $\left(米⩾\mathrm{1个}\right)$和使用量阈值（允许的使用量限制）。如果在LC期内产品的总使用量低于使用量阈值，则不需要额外的费用。否则，承租人需要支付一些额外费用。出租人负责在信用证期内执行维护操作，并保证高可用性（或低停机时间）。如果停机时间超过了目标，则出租人将遭受罚款。再制造产品的信用证价格便宜得多，因此变得有吸引力，在承租人寻找信用证的更好选择时需要考虑。对于所研究的多期信用证，出租人将决定所提供信用证的维护政策和价格，而承租人将找到其使用率和适用于其业务的信用证期限。