The Lanchester prize is awarded for the best contribution to operations research and the management sciences published in English in the past five years (i.e. 2018 or more recent). For a group of publications, at least one publication of the group must have been published during that same five-year period. The prize includes a commemorative medallion and a U.S. $5,000 cash award. The award is given each year at the fall INFORMS Annual Meeting.