This object tracks the maximum delay difference observed across links in an Inverse Multiplexing over ATM (IMA) group, measured between the link with the fastest propagation delay and the slowest one. Network operators use this metric to understand the spread of delay across bundled ATM links, which is critical for ensuring synchronization and avoiding performance issues in bonded ATM connections. The value is expressed in milliseconds and updates whenever a new measurement reveals a larger differential than previously observed.