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# CITATION.cff file created with {cffr} R package
# See also: https://docs.ropensci.org/cffr/
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cff-version: 1.2.0
message: 'To cite package "turfLP" in publications use:'
type: software
license: MIT
title: 'turfLP: TURF Analysis with Integer Linear Programming'
version: 0.2.0
identifiers:
- type: doi
  value: 10.32614/CRAN.package.turfLP
abstract: Finds product portfolios that maximize TURF (total unduplicated reach and
  frequency) with integer linear programming, following Serra (2013) <https://doi.org/10.1016/j.foodqual.2012.10.001>.
  The maximum reach problem is the maximal covering location problem of Church and
  ReVelle (1974) <https://doi.org/10.1007/BF01942293>. The package solves it as an
  integer linear program, so it finds exact optima without enumerating every portfolio.
  Ties on reach are broken by frequency and then by the harmonic mean of the individual
  product reaches. The package also finds the smallest portfolio that reaches every
  reachable respondent. For related work on TURF for large data sets, see Ennis, Fayle,
  and Ennis (2012) <https://doi.org/10.1016/j.foodqual.2011.06.004>.
authors:
- family-names: Ennis
  given-names: John
  email: john.m.ennis@aigora.com
preferred-citation:
  type: manual
  title: 'turfLP: TURF Analysis with Integer Linear Programming'
  authors:
  - family-names: Ennis
    given-names: John
    email: john.m.ennis@aigora.com
  year: '2026'
  notes: R package version 0.2.0
  url: https://github.com/aigorahub/turfLP
repository: https://aigorahub.r-universe.dev
repository-code: https://github.com/aigorahub/turfLP
commit: 06afb81c7c1d9cca7c97137caffe2b3e4d23588e
url: https://github.com/aigorahub/turfLP
date-released: '2026-10-15'
contact:
- family-names: Ennis
  given-names: John
  email: john.m.ennis@aigora.com
references:
- type: article
  title: Implementing TURF Analysis Through Binary Linear Programming
  authors:
  - family-names: Serra
    given-names: Daniel
  journal: Food Quality and Preference
  volume: '28'
  issue: '1'
  year: '2013'
  doi: 10.1016/j.foodqual.2012.10.001
  start: '382'
  end: '388'
- type: article
  title: 'eTURF: A Competitive TURF Algorithm for Large Datasets'
  authors:
  - family-names: Ennis
    given-names: John M.
  - family-names: Fayle
    given-names: Charles M.
  - family-names: Ennis
    given-names: Daniel M.
  journal: Food Quality and Preference
  volume: '23'
  issue: '1'
  year: '2012'
  doi: 10.1016/j.foodqual.2011.06.004
  start: '44'
  end: '48'