However, apart from the acoustic properties of coconut, no physical or physiological properties (including acidity) have ever been shown to reliably correlate with the maturity of young coconut. Nevertheless, even when it is understood that human beings are at present the most reliable sensing instrument for coconut maturity, the fact that on-line packing lines are an established part of the coconut processing industry means that it is necessary to develop quantitative information to sort fruit of different maturity. This research therefore aims to (a) investigate the physical, mechanical, physiological and acoustic properties of young coconut in relation to maturity, and (b) develop a multivariate model for predicting a young coconut maturity index using a partial least squares technique.