If the company plans to submit an economic model, it should inform NICE which software will be used. NICE accepts fully executable economic models using standard software, that is, Excel, DATA/Treeage, R or WinBUGs. If the company plans to submit a model in a different software package, it should tell NICE in advance. NICE, in association with the ERG, will then investigate whether the requested software is acceptable. When the company submits a fully executable electronic copy of the model, it must give NICE full access to the programming code. Care should be taken to ensure that the submitted versions of the model program and the written content of the evidence submission match.