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Which of the following is NOT an extra service?

  1. Designing and detailing custom built-in furniture

  2. Arranging and paying for an electrical engineering consultant

  3. Maintaining continuous supervision on the job site

  4. Making a detailed survey of existing space prior to design

The correct answer is: Designing and detailing custom built-in furniture

The correct answer is that designing and detailing custom built-in furniture is not considered an extra service. This task typically falls within the scope of standard design services provided by an interior designer or architect. It involves the creation of specific design elements that are an integral part of the project rather than an additional or separate service that exceeds the standard responsibilities. In contrast, the other options represent activities that extend beyond the core design services. For example, arranging for and paying an electrical engineering consultant involves coordinating with other professionals for specialized engineering insights, which is usually an additional service. Similarly, maintaining continuous supervision on the job site goes beyond the standard design duties, as it requires ongoing oversight of the construction process, ensuring that work aligns with the design specifications. Lastly, making a detailed survey of the existing space before starting design work is often a preliminary step that may be considered an extra service if it requires extensive effort or specific expertise beyond the standard design services.