Most BIM professionals working today are good at building models. Clean geometry, coordinated systems, correct LOD, properly structured files. That is the baseline now.A well-built 3D model will tell you exactly where the pipes go and whether the steel clashes with the facade. What it cannot tell you is when any of it will actually be built, or what happens to the budget if the concrete programme runs two weeks late. That is the gap that 4D and 5D BIM training addresses. And