Cited by 56Control Systems and IdentificationStatistical and numerical algorithmsAgriculture, Soil, Plant Science

Review: To be or not to be an identifiable model. Is this a relevant question in animal science modelling?

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Muñoz-Tamayo, R., Puillet, L., Daniel, J.B., Sauvant, D., Martin, O., Taghipoor, M., Blavy, P.·2018·animal

Abstract

What is a good (useful) mathematical model in animal science? For models constructed for prediction purposes, the question of model adequacy (usefulness) has been traditionally tackled by statistical analysis applied to observed experimental data relative to model-predicted variables. However, little attention has been paid to analytic tools that exploit the mathematical properties of the model equations. For example, in the context of model calibration, before attempting a numerical estimation of the model parameters, we might want to know if we have any chance of success in estimating a unique best value of the model parameters from available measurements. This question of uniqueness is referred to as structural identifiability; a mathematical property that is defined on the sole basis of the model structure within a hypothetical ideal experiment determined by a setting of model inputs (stimuli) and observable variables (measurements). Structural identifiability analysis applied to dynamic models described by ordinary differential equations (ODEs) is a common practice in control engineering and system identification. This analysis demands mathematical technicalities that are beyond the academic background of animal science, which might explain the lack of pervasiveness of identifiability analysis in animal science modelling. To fill this gap, in this paper we address the analysis of structural identifiability from a practitioner perspective by capitalizing on the use of dedicated software tools. Our objectives are (i) to provide a comprehensive explanation of the structural identifiability notion for the community of animal science modelling, (ii) to assess the relevance of identifiability analysis in animal science modelling and (iii) to motivate the community to use identifiability analysis in the modelling practice (when the identifiability question is relevant). We focus our study on ODE models. By using illustrative examples that include published mathematical models describing lactation in cattle, we show how structural identifiability analysis can contribute to advancing mathematical modelling in animal science towards the production of useful models and, moreover, highly informative experiments via optimal experiment design. Rather than attempting to impose a systematic identifiability analysis to the modelling community during model developments, we wish to open a window towards the discovery of a powerful tool for model construction and experiment design.

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Research works printed but not linked: 2

  1. Boston RC, Wilkins P and Tedeschi LO 2007. Identifiability and accuracy: two critical problems associated with the application of models in nutrition and the health sciences. In Mathematical modeling for nutrition and health sciences (ed. M Hanigan), pp. 161-193.
  2. Khalil HK 2000. Nonlinear systems. Pearson Education International Inc, Upper Saddle River, NJ.

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Authors
Muñoz-Tamayo, R., Puillet, L., Daniel, J. B., Sauvant, D., Martin, O., Taghipoor, M., & Blavy, P.
Affiliations
  • AgroParisTech (FR)
  • Institut Agro Rennes-Angers (FR)
Venue
animal
Publisher
Elsevier BV
Published
2018
Volume
12
Issue
4
Pages
701-712
ISSN
1751-7311 (ISSN-L)
OpenAlex
W2641287658
Cited by
56
References
49
Citations by year
2026: 2 · 2025: 9 · 2024: 3 · 2023: 9 · 2022: 8 · 2021: 3 · 2020: 9 · 2019: 9 · 2018: 4
FWCI
0.99
Type
journal article
Language
en
Open access
Locations
  • animal (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Università degli Studi di Padova
  • AgroParisTech
  • Institut National de la Recherche Agronomique
Topics
  • Physical Sciences › Engineering › Control and Systems Engineering › Control Systems and Identification
  • Physical Sciences › Mathematics › Applied Mathematics › Statistical and numerical algorithms
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Agriculture, Soil, Plant Science
Keywords
structural identifiability, ordinary differential equation model, model calibration, parameter estimation, cattle, optimal experiment design, model adequacy
MeSH terms
Animals, Cattle, Female, Laboratory Animal Science, Lactation, Models, Biological, Research Design, Software, Models, Statistical, Models, Animal, Animal Nutrition Sciences

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