Alison Grant Harcourt AO (née Doig; born 24 November 1929)[1] is an Australian mathematician and statistician most well-known for co-defining the branch and bound algorithm along with Ailsa Land whilst carrying out research at the London School of Economics.

Her father was Keith Doig, a physician and Australian rules footballer who received the Military Cross during World War I.

The team developed the Henderson Poverty Line in 1973, which was the disposable income required to support the basic needs of a family of two adults and two dependent children.

The techniques developed by the Henderson team have been used by the Melbourne Institute of Applied Economic and Social Research to regularly update the poverty line for Australia since 1979.

[13] In June 2019, Harcourt was made an Officer of the Order of Australia in recognition of her "distinguished service to mathematics and computer science through pioneering research and development of integer linear programming".