The Blueprint Method (diagnostic procedure)
One mechanism from Chapter 14: The Blueprint.
flowchart TD A["Identify the symptom (what is out of bounds)"] --> B["Identify the component (where the symptom lives)"] B --> C["List the forces acting on it (scale, corrosion, biology, solids, plus heat and flow)"] C --> D["Apply the mass balance (what enters, leaves, or concentrates changed?)"] D --> E["Check feed rates, load, cycles, makeup chemistry, blowdown, air ingress, condensate return"] E --> F["Pull the smallest lever that corrects the cause, not the reading"]