Stability index for connected equipment

A building management system comprising:

• one or more memory devices having instructions stored thereon that, when executed by one or more processors, cause the one or more processors to perform operations comprising:
• receiving, from a building device, time series data regarding a first operational parameter of the building device;
• determining, for one or more time steps of the time series data, a deviation between a setpoint and a recorded value of the first operational parameter;
• calculating, for the one or more time steps, a trapezoidal area based on an absolute value of the deviation and a length of a time step;
• calculating a stability index value for the building equipment by summing trapezoidal areas for a subset of the one or more time steps over a time horizon;
• and
• initiating an automated response based on the stability index value.

A non-transitory computer-readable storage media having computer-executable instructions stored thereon that, when executed by one or more processors, cause the one or more processors to perform operations comprising:

• retrieving, from a database, time series data related to a first operational parameter of a building device;
• filtering the time series data based on a second operational parameter;
• determining, for a plurality of steps of the time series data, a deviation between a setpoint and a recorded value of the first operational parameter;
• calculating, for the plurality of steps, a trapezoidal area based on an absolute value of the deviation and a length of the plurality of steps;
• calculating a stability index value for the building device by summing trapezoidal areas for a subset of the plurality of steps over a time horizon;
• and
• initiating an automated response based on the stability index value.