Final answer:
The flow of engineering design process is of principal interest to Rose Mary in maintaining the job-order costing system for Hanneken Homes.
Step-by-step explanation:
The flow of engineering design process is of principal interest to Rose Mary in maintaining the job-order costing system for Hanneken Homes. This process involves the steps and activities taken to design a product, from conceptualization to finalization. It includes activities such as research, analysis, prototyping, testing, and refining the design based on feedback.
By understanding the flow of the engineering design process, Rose Mary can accurately allocate costs to specific projects and track the progress of each design. This information is crucial for job-order costing, as it helps determine the cost of materials, labor, and overhead associated with each project.