Welcome to this homepage.

Here you will find the software SPIonExcel for calculating fast and easily an ecological footprint of processes and products. For basic information on the Sustainable Process Index, the model SPIonExcel is based upon, look in the SPI area. The software as well as an handbook and additional databases can be found in the download area. The area publications contains a list of papers and book chapters dealing with the topic SPI and SPIonExcel. For discussion and questions please use the forum or contact the developers. NEWS Students of our institute have used the SPI to compare different foods. They have programmed an MS Excel sheet to present their results. This MS Excel sheet (in German language) can be obtained at the download section.