Which entity or individual is typically responsible for defining assignment parameters?

The correct choice is that the appraiser is typically responsible for defining assignment parameters. In the appraisal process, the appraiser takes on the critical role of interpreting the client's instructions and translating them into a structured approach for the appraisal. This involves determining the scope of work, including the necessary research, data analysis, and methods to be employed.

While the client plays a significant role in initiating the assignment and may provide specific requirements or objectives, it is ultimately the appraiser who assesses these needs and effectively sets the detailed parameters for how the appraisal will be carried out. This includes deciding on the appropriate valuation methodology, identifying relevant comparable properties, and determining the level of detail required in the final report.

The property owner, while a key stakeholder in the process, does not directly influence how the appraisal is conducted beyond perhaps stating their perspective on the property's value. Similarly, an agent might represent the property owner or the client but does not define the parameters of the appraisal assignment. The appraiser's expertise is critical in ensuring that the appraisal meets professional standards and fulfills the intended purpose for which it was commissioned.