Which method of determining peak demand is based on experience and judgement?

The empirical method is based on experience and judgment, which distinguishes it from more analytical approaches. In this method, professionals rely on historical data, observed patterns, and their own expertise to estimate peak demands. This approach factors in various real-world conditions and nuances that can affect water usage or plumbing system requirements.

Empirical methods allow for flexibility and adaptability, as practitioners can adjust calculations based on their observations and the specific context of a project. This can be particularly valuable in scenarios where statistical data may not comprehensively capture the unique usage patterns of a facility or area.

The other methods, while useful in their own right, are primarily grounded in mathematical analysis or defined probabilities, which do not inherently rely on the subjective expertise of an individual.