The decision support system (DSS) presented here is dealing with the production planning and scheduling in the textile industry. The DSS aims at the efficient management of a mixed production system (job-shop and now-shop), such as that of the textile industry. Its main feature is the effective combination of a database and a model based management system in order to merge existing expert knowledge. A powerfull user interface makes the DSS user-friendly and a multi-module formulation is used for better interpretation and analysis of the production procedures.