Remanufacturing is the process of isassembly and recovery at the module level and, eventually, at the component level. It requires the repair or replacement of worn out or obsolete components and modules. Parts subject to degradation affecting the performance or the expected life of the whole are replaced. Remanufacturing differs from other recovery processes in its completeness: a remanufactured machine should match the same customer expectation as new machines. There are three types of remanufacturing activities, each with different operational challenges.