Logical data flow diagrams illustrate how data flows in a system, with a focus on the business processes and workflows. With a focus on how the business operates at a high level, logical data flow ...

The flow diagram helps electrical and plumbing engineers verify conditions. For new projects, the diagram assists automatic temperature control and TAB contractors during implementation. Building ...

Those of you who read this column on a regular basis will know that I always mandate that a design engineer start with a flow diagram of the HVAC system he is preparing to design or retrocommission.