DIAPASON is an Enterprise Resource Planning solution designed by ISIA. Our 20 years of experience has enabled to validate : joiners standard, wide-ranging functionalities that are open and easily adaptable, carpenters widely-extending customizable modules, based exclusively on configurable settings. This development concept makes DIAPASON particularly well-suited to industries with specific or complex requirements, who wish to base their ERP system on a durable standard, that ensures the sustainability of their investment. This concept also enables to verticalise DIAPASON using settings that are pre-configured for any industry. This is the case today for the door and window industry as well as furniture manufacturing, in which DIAPASON has become the reference ERP software.