Method for the maintenance of a measuring point in a process automation system, said method comprising the following steps: - Recording of the product type (P 1, P 2) of each field device of a multitude of field devices (F 1, F 2, F 3), wherein the field devices are located in a warehouse, and saving of the product types (P 1, P 2) in a database; - Capturing of device features (GM 1, GM 2, GM 3, GM 4) of the multitude of field devices (F 1, F 2, F 3), wherein the device features (GM 1, GM 2, GM 3, GM 4) constitute a discrete representation of the performance characteristics of each of the multiple field devices, and assignment of the various device characteristics (GM 1, GM 2, GM 3, GM 4) to the product types (P 1, P 2) saved in the database; - Capturing of the product type (P x) and the device characteristics (GM x) of a field device that is located in the measuring point and is to be replaced; - Comparison of the product type (P x) and the device characteristics (GM x) of the field device to be replaced with the product types (P 1, P 2) saved in the database and the assigned device characteristics (GM 1, GM 2, GM 3, GM 4); - Calculation of a suitability assessment using a replacement matrix for each of the multiple field devices (F 1, F 2, F 3), wherein the suitability assessment represents a degree of similarity of the device characteristics (GM 1, GM 2, GM 3, GM 4, GM x) and wherein the replacement matrix is a rule for the mutual replacement of different device characteristics (GM 1, GM 2, GM 3, GM 4, GM x); and - Disclosure of suitability assessments to a client, wherein the client selects a replacement field device from the multitude of field devices (F 1, F 2, F 3) on the basis of the suitability assessment, wherein a higher suitability assessment represents a higher degree of similarity of the device characteristics (GM 1, GM 2, GM 3, GM 4, GM x). - Recording of the product type (P 1, P 2) of each field device of a multitude of field devices (F 1, F 2, F 3), wherein the field devices are located in a warehouse, and saving of the product types (P 1, P 2) in a database; - Capturing of device features (GM 1, GM 2, GM 3, GM 4) of the multitude of field devices (F 1, F 2, F 3), wherein the device features (GM 1, GM 2, GM 3, GM 4) constitute a discrete representation of the performance characteristics of each of the multiple field devices, and assignment of the various device characteristics (GM 1, GM 2, GM 3, GM 4) to the product types (P 1, P 2) saved in the database; - Capturing of the product type (P x) and the device characteristics (GM x) of a field device that is located in the measuring point and is to be replaced; - Comparison of the product type (P x) and the device characteristics (GM x) of the field device to be replaced with the product types (P 1, P 2) saved in the database and the assigned device characteristics (GM 1, GM 2, GM 3, GM 4); - Calculation of a suitability assessment using a replacement matrix for each of the multiple field devices (F 1, F 2, F 3), wherein the suitability assessment represents a degree of similarity of the device characteristics (GM 1, GM 2, GM 3, GM 4, GM x) and wherein the replacement matrix is a rule for the mutual replacement of different device characteristics (GM 1, GM 2, GM 3, GM 4, GM x); and - Disclosure of suitability assessments to a client, wherein the client selects a replacement field device from the multitude of field devices (F 1, F 2, F 3) on the basis of the suitability assessment, wherein a higher suitability assessment represents a higher degree of similarity of the device characteristics (GM 1, GM 2, GM 3, GM 4, GM x).