Heading for an ecological production, precise specifications regarding a maximal amount of harmful substances emitted is needed. By defining a quantifiable goal for carbon dioxide on product component level, a precise evaluation of the current product-portfolio’s sustainability becomes feasible. Therefore incorrect practices on shop floor level can be observed and eliminated by appropriate and cost-efficient concepts. A structured calculation model for quantifying the sustainable carbon dioxide emission over the entire product life cycle is being developed: the Target Allowance. This enables production systems to implement ecological minimum requirements oriented on the absolute, global maximum loading.