Which method of renumeration is used when a Professional Consulting Architect is required intermittently?

The correct method of remuneration for a Professional Consulting Architect who is needed intermittently is a retainer. This approach involves paying a fee in advance to secure the architect's availability when required. The retainer establishes a contractual agreement that allows the architect to be called upon as necessary, without committing to a full-time engagement. This is particularly suited for intermittent needs, as it provides flexibility and ensures that the architect is compensated for their availability even when they are not engaged in active projects.

In contrast, full-time supervision requires a continuous commitment of time and resources, which may not align with the intermittent nature of the work. Reimbursable expenses typically cover costs incurred during the execution of a project but do not constitute a regular payment structure for intermittent consulting services. Per diem or hourly billing, while common for specific tasks or short-term engagements, may not offer the reliability of a retainer for ongoing availability. This makes the retainer the most appropriate choice for an architect whose services are required on an as-needed basis.