Service operation impedance and its role in projecting some key features in service contracts

This paper introduces the notion of implicit Operation Impedance (I) and Operation Potential (V) in Service Provider-Consumer contracts. ‘I’ is the runtime composite resultant of all the activity delays of the components supporting the Service Operation. This work establishes that ‘I’, which impacts the overall Operation Performance (P), is influenced by the underlying application components’ activities in distinct patterns. A high-level runtime abstract model is empirically deduced between ‘I’, ‘V’ and ‘P’ by applying established mathematical techniques. Model based indicative values of some features are computed against variability of the operation’s components. Lookup datasets against different system configurations are created to associate these computed values to the actual empirical values of other features. Established mathematical techniques applied with appropriate regression types to enable trend extrapolation/interpolation. The datasets/patterns affirmed effectiveness of the ‘I’ based model as a means of decoupled, bidirectional i.e. top-down and bottom-up impact assessment of modifications to the operation’s underlying application components on ‘P’ (‘V’ constant) or ‘V’ (‘P’ constant) without repetitive full scale external performance/benchmark testing. This also enables fine tuning of application components to retrofit prescribed Quality of Service (QoS). The paper briefly mentions a Matrix Transpose/Inverse technique for future assessment of multiple component changes simultaneously