1. A method of analyzing time series data obtained from one or more printers, the method comprising: receiving a query comprising a machine variable identifier, wherein the machine variable identifier comprises an identifier pertaining to one or more of a state, a condition and a performance measure for a printer; determining a first time series data entry based on the query, wherein the first time series data entry comprises a data value and a time entry for the machine variable identifier; selecting one or more second time series data entries based on the data value associated with the first time series data entry; and performing one or more maintenance operations based on the one or more second time series data entries.