The DDEC Web application provides engine parameters for programming Detroit Diesel Engine Controllers. Originally a mainframe IMS application, it was ported to Java/Spring Boot using the QRE framework for IMS transaction emulation. The application is now being migrated to ASP.NET Core MVC with direct EF Core data access, eliminating the mainframe emulation layer entirely.
Documentation for the original C++ MFC desktop application that programs engine controllers. See the DIF MAUI project for the modern .NET replacement.