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IAT Model

The IAT was developed to account for climate variability and to evaluate changes to configurations and management strategies over multiple years in smallholder farming systems in eastern Indonesia. It does not apply an objective function and allows for the assessment of different solutions against personal objectives of households. The IAT’s strength is that it includes a well developed livestock production model that has been tested with many smallholder households. The IAT differs from linear programs as it includes climate-driven variable inputs of crop yields and forage that translate into different levels of livestock production. The livestock production model is not static, as is the case in many linear programs. The IAT includes climate variability, economic calculations and a well developed livestock model. Previous studies do not include all three.


FeedBase is a GIS-based animal feed database system, carried out by the National Institute of Animal Nutrition and Physiology. FeedBase aims to be a vital decision support system that provides information about the availability of different feed resources, requirements for various species of livestock and the feed balance in India for the period 1995 – 2011. This information is classified by states and agro-climatic regions.



The Village Poultry Simulation Model (VIPOSIM) was used to simulate village poultry systems for both Ethiopia and India which is a dynamic deterministic model developed to simulate the dynamics of village poultry flocks. The model was developed at Wageningen University, in the Netherlands, and validated with data from Tigray, Ethiopia (Asgedom 2007). Qualitative data are used to conceptualise the model relations, whereas quantitative data are used to quantify those relationships and to define input values for a village poultry systems. VIPOSIM takes into account the complex and dynamic aspects of a village poultry production system by incorporating five processes related to chicken production and management (flock offtake, egg production, egg loss, egg offtake and reproduction). The model performs calculations in time steps representing reproduction cycles. Each step has a length of three months (seasonally) and the maximum number of steps in the model is twelve, which corresponds to a period of three years. The economic parameters such as prices of birds and eggs and costs of production are also input variables in the model. VIPOSIM categorises total costs from the input costs of labour and costs of intervention. The model also incorporates the standard deviations of each input parameter.