Cottonspec, a spinning prediction software, has proven a useful management tool, giving spinners immediate feedback on the fibre quality they use. The program gives excellent predictions of yarn quality. Cottonspec has also been used to demonstrate the value of new varieties of long staple cotton produced by Australian growers. Cottonspec has the capacity to improve the classification of Australian cotton by linking cotton fibre quality with yarn quality with theoretical modelling. The prediction algorithms favour long, strong, bright cotton, i.e. play on Australian cotton fibre strengths, and will utilize Australian test methods for fibre fineness and maturity, which will give the yarn quality models more prediction power. The package can be used by spinners to select the most suitable cottons, which best meet the spinner's needs, or as a quality control tool to benchmark performance against "best commercial practice". Cottonspec can also be used as a trading tool for merchants to promote the value of a particular growth, or used by cotton researchers and grower collectives to assess and promote new cotton varieties