| Summary: | In the services world, the expected benefits are the fastest time to market, lower costs, greater consistency in the application, and increased agility. The reuse and sharing properties of software components are useful to address these challenges. However, to achieve this, it is necessary to be able to observe each service and to control the service composition. This article proposes to rethink the company’s organisational process of application development and use the power of monitoring to help the application design. The proposed Monitoring as-a-service (MaaS), whose properties are detailed, will be used for the computation of the oered Quality of Service (QoS), for the services calibration during the service creation phase and to inform the QoS Controller during the operational phase. For eective design, the architect will place MaaS at crucial points of its architecture according to its decision-making process. Finally, we present experimental results and a conclusion ends the paper.
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