The work to be carried out by TUW-IVV is to support the use of SPM(MARS) model as applied to Edinburgh in WP4 of the DOW. This includes programming changes required to implement technology based scenarios as defined in WP3, possible changes to indicators and appraisal mechanisms and general support in using the MARS model. The original contract implied the use of MARS version 6y but it may be that by the time WP4 begins we will be using a VENSIM platform ¿ if so then similar support would be expected as part of this sub-contract. Alongside the specific programming work TUW-IVV are also able to contribute as appropriate to dissemination activities such as publications in journals and conference articles.