An apparatus comprising: a health quantifier calculator configured to execute a plurality of computer-generated models (450, 452, 454, 456) to generate first sensor data of a turbine engine, which comprises a plurality of assets, wherein the first sensor data is based on simulating a sensor (144, 146) monitoring the turbine engine, wherein the plurality of computer-generated models (450, 452, 454, 456) includes a physics-based model, a stochastic model, a historical data model, and a hybrid model; a parameter tracker configured to execute a tracking filter using the first sensor data and second sensor data to generate third sensor data corresponding to the turbine engine, wherein the second sensor data is based on obtaining sensor data from a sensor (144, 146) monitoring the turbine engine, and wherein the third sensor data is based on comparing the first sensor data to the second sensor data; wherein the health quantifier calculator is configured to execute the computer-generated model (450, 452, 454, 456) using the third sensor data to generate an asset health quantifier of the turbine engine, wherein the asset health quantifier comprises a numerical representation corresponding to a health status or an operational status of an asset, comprised within the turbine engine; and the apparatus further comprises a recommendation generator configured to generate a workscope recommendation, said workscope recommendation comprising a recommendation for one or more tasks to be carried out in relation to the asset, to improve an operation of the turbine engine when the asset health quantifier satisfies a threshold, and wherein generation of the workscope recommendation comprises: generating a plurality of possible workscopes, each of which includes a respective combination of one or more workscope tasks, calculating an estimate of what the respective asset health quantifier for the target asset would be in response to performing each of the plurality of workscope tasks on the target asset; and selecting one of the possible workscopes as the workscope recommendation, based on comparing each of the estimated asset health quantifiers to one or more requirements or constraints for the target asset. a health quantifier calculator configured to execute a plurality of computer-generated models (450, 452, 454, 456) to generate first sensor data of a turbine engine, which comprises a plurality of assets, wherein the first sensor data is based on simulating a sensor (144, 146) monitoring the turbine engine, wherein the plurality of computer-generated models (450, 452, 454, 456) includes a physics-based model, a stochastic model, a historical data model, and a hybrid model; a parameter tracker configured to execute a tracking filter using the first sensor data and second sensor data to generate third sensor data corresponding to the turbine engine, wherein the second sensor data is based on obtaining sensor data from a sensor (144, 146) monitoring the turbine engine, and wherein the third sensor data is based on comparing the first sensor data to the second sensor data; wherein the health quantifier calculator is configured to execute the computer-generated model (450, 452, 454, 456) using the third sensor data to generate an asset health quantifier of the turbine engine, wherein the asset health quantifier comprises a numerical representation corresponding to a health status or an operational status of an asset, comprised within the turbine engine; and generating a plurality of possible workscopes, each of which includes a respective combination of one or more workscope tasks, calculating an estimate of what the respective asset health quantifier for the target asset would be in response to performing each of the plurality of workscope tasks on the target asset; and selecting one of the possible workscopes as the workscope recommendation, based on comparing each of the estimated asset health quantifiers to one or more requirements or constraints for the target asset.