A method, comprising: at a device, receiving device-under-service -related data for a DUS based on a first test performed on the DUS, the DUS-related data comprising complaint data related to a complaint that is due to a first component of the DUS, and test data for at least the first test; at the device, determining one or more classifications for the test data based on the complaint data, wherein the one or more classifications comprise complaint-oriented classifications associated with components of the DUS, and wherein determining the one or more classifications comprises: classifying the test data with a first complaint-oriented classification associated with the first component of the DUS; determining whether data conveyed as part of the test data is unrelated to the complaint; and after determining that the data conveyed as part of the test data is unrelated to the complaint, reclassifying the data conveyed as part of the test data with a second complaint-oriented classification that is associated with a second component of the DUS, wherein the second complaint-oriented classification differs from the first complaint-oriented classification; at the device, determining that the DUS-related data is to be aggregated into aggregated data based on the one or more classifications for the test data; at the device, generating a first aggregated-data comparison of the DUS-related data and the aggregated data; at the device, generating a diagnostic request based on the aggregated-data comparison, the diagnostic request for requesting data related to a second DUS test performed at the DUS; at the device, receiving DUS-related data based on the second DUS test; at the device, generating a DUS report based on a second aggregated-data comparison of the DUS-related data based on the second DUS test and aggregated data, the DUS report comprising one or more sub-strategies, wherein at least one of the one or more sub-strategies comprises a sub-strategy-success estimate; and sending the DUS report from the device. at a device, receiving device-under-service -related data for a DUS based on a first test performed on the DUS, the DUS-related data comprising complaint data related to a complaint that is due to a first component of the DUS, and test data for at least the first test; at the device, determining one or more classifications for the test data based on the complaint data, wherein the one or more classifications comprise complaint-oriented classifications associated with components of the DUS, and wherein determining the one or more classifications comprises: classifying the test data with a first complaint-oriented classification associated with the first component of the DUS; determining whether data conveyed as part of the test data is unrelated to the complaint; and after determining that the data conveyed as part of the test data is unrelated to the complaint, reclassifying the data conveyed as part of the test data with a second complaint-oriented classification that is associated with a second component of the DUS, wherein the second complaint-oriented classification differs from the first complaint-oriented classification; classifying the test data with a first complaint-oriented classification associated with the first component of the DUS; determining whether data conveyed as part of the test data is unrelated to the complaint; and after determining that the data conveyed as part of the test data is unrelated to the complaint, reclassifying the data conveyed as part of the test data with a second complaint-oriented classification that is associated with a second component of the DUS, wherein the second complaint-oriented classification differs from the first complaint-oriented classification; at the device, determining that the DUS-related data is to be aggregated into aggregated data based on the one or more classifications for the test data; at the device, generating a first aggregated-data comparison of the DUS-related data and the aggregated data; at the device, generating a diagnostic request based on the aggregated-data comparison, the diagnostic request for requesting data related to a second DUS test performed at the DUS; at the device, receiving DUS-related data based on the second DUS test; at the device, generating a DUS report based on a second aggregated-data comparison of the DUS-related data based on the second DUS test and aggregated data, the DUS report comprising one or more sub-strategies, wherein at least one of the one or more sub-strategies comprises a sub-strategy-success estimate; and sending the DUS report from the device.