Under the inventive process, the customised split insole is made by processing manually collected medical data and arch data along with plantar pressure distribution data and foot type data both of which are collected using a computer enabled Plantar Pressure Measuring Device in a first computer and processing these data in a second computer to generate a Projection Data which is expressed in Shore Hardness Value. Then, ranking of the projection data into a zone wise Ranking Index, determining the elasticity of the material to be used for the said Shore Hardness Value, converting the said shore hardness value into Surface Tessellation Language and transmitting the same to a third computer built into a 3D printing machine which selects a suitable material and its elasticity zone wise as per the Shore Hardness Value and 3D prints the same.