This chapter proposes a systems design procedure to integrate mechanical design, structural prototyping, and servo evaluation through careful comprehension of the servo-mechanical-prototype production cycle commonly employed in the R&D processes of mechatronic industries. It focuses on the Modal Parametric Identification (MPI) of key feedback parameters for fast exchange of design specifications and information. The chapter introduces the essential background of R&D functions in a typical production cycle of mechatronic products in industries. It presents an integrated systems design approach for managing the complexities of a mechatronic R&D project. The chapter focuses on the development of the proposed MPI algorithm for feedback information identification, which is key to the success of the proposed integrative servo-mechanical systems design. It presents a case example of the application of the proposed MPI to the implementation of dual-stage actuation in current HDD industries with robustness considerations.