4. Prepare technical elements for the acquisition of components and/or (sub)systems of the system under study

Perform and iterate the following activities for each component or (sub)system of the chosen physical architecture:

• Express the mission of the component or (sub)system (based on the functions allocated to this component), its objectives (based on the allocation of performance and efficiency), and its purpose in relation to the system studied (which includes it).

• Express the requirements for the component or (sub)system from the elements allocated (requirements of the system under study, design properties) during the design of the system under study (which encompasses it). To consolidate the requirements for each component or (sub-)system, consult the sheet Requirements Engineering for a Complex System