Final answer:
The progress of a project should be documented by communicating the activities and results of the design process and documenting the mathematical model of operation. All steps of the design process should be documented, including the science behind the choice of solution.
Step-by-step explanation:
The progress of a project should be documented by communicating the activities and results of the design process to the appropriate client or customer. This documentation helps demonstrate the effectiveness of the design in fulfilling the client's needs. It is also important to document the mathematical model of operation to show the basis for performance and effectiveness. Additionally, all steps of the design process should be documented, including the science behind the choice of solution and the justification for decisions made.