In one embodiment, a service identifies a performance issue exhibited by a first device in a first network. The service forms a set of one or more time series of one or more characteristics of the first device associated with the identified performance issue. The service generates a mapping between the set of one or more time series of one or more characteristics of the first device to one or more time series of one or more characteristics of a second device in a second network. The mapping comprises a relevancy score that quantifies a degree of similarity between the characteristics of the first and second devices. The service determines a likelihood of the second device exhibiting the performance issue based on the generated mapping and on the relevancy score. The service provides an indication of the determined likelihood to a user interface associated with the second network.