Agent toolkit are now being offered by a recent start-up company called Predictronics Corporation in which the founders were instrumental in the development and application of this PHM technology at the Center for Intelligent Maintenance Systems. Another example is MATLAB and its Predictive Maintenance Toolbox which provides functions and an interactive app for exploring, extracting, and ranking features using data-based and model-based techniques, including statistical, spectral, and time-series analysis. This toolbox also includes reference examples for motors, gearboxes, batteries, and other machines that can be reused for developing custom predictive maintenance and condition monitoring algorithms. Other commercial software offerings focus on a few tools for anomaly detection and fault diagnosis, and are typically offered as a package solution instead of a toolkit offering. Example includes Smart Signals anomaly detection analytical method, based on auto-associative type models (similarity based modeling) that look for changes in the nominal correlation relationship in the signals, calculates residuals between expected and actual performance, and then performs hypothesis testing on the residual signals (sequential probability ratio test). Similar types of analysis methods are also offered by Expert Microsystems, which uses a similar auto-associative kernel method for calculating residuals, and has other modules for diagnosis and prediction. System-level prognostics While most prognostics approaches focus on accurate computation of the degradation rate and the remaining useful life (RUL) of individual components, it is the rate at which the performance of subsystems and systems degrade that is of greater interest to the operators and maintenance personnel of these systems. See also Futures studies Planned obsolescence Prediction Predictive maintenance Preventive maintenance Wind turbine prognostics Notes External links Prognostics Journal is an open access journal that provides an international forum for the electronic publication of original research and industrial experience articles in all areas of systems prognostics. International Journal of Prognostics and Health Management The Prognostics and Health Management Society (PHM Society) is an international non-profit professional organization dedicated to the advancement of PHM as an engineering discipline. Centre for Prognostics and System Health Management at City University of Hong Kong is dedicated to developing PHM technologies that can benefit the industries by increasing their competitiveness and profitability. China PHM Society is a non-profit organization established to address the key needs of the Chinese community relating to quality, reliability, maintainability, safety and sustainability. The Annual Conference of the PHM Society is an annual international conference focusing exclusively on PHM. The Joint